Skip to content A B C D E F G H I J K L M N O P Q R S T U V W X Y Z undernatural Not natural enough. undernature An underlying, secretive, or surreptitious nature. underneath Below; in a place beneath. underneathness The quality of being underneath. underneaths genitalia underness The quality of being under (beneath or below). undernet The criminal underworld in cyberspace. underneutralization The process of underneutralizing. underneutralize To make less neutral than required or expected, or (chemistry) closer to the neutral pH value without reaching it. underniceness Lack of delicacy or fastidiousness. undernose Located under the nose of the aircraft undernote A low or subdued note, such as a drone, that forms a background to the melody. undernoted Of which a note is made underneath, or further down in a document. undernotification Incomplete notification (typically of deaths) undernourish To provide with insufficient nourishment. undernourished Provided with insufficient nourishment to sustain proper health and growth. undernourishment Insufficient nourishment undernurse A subordinate nurse. undernutrition Inadequate nutrition, either due to a lack of food, or to the inability of the body to absorb its nutrients. undernutritional Relating to undernutrition undernutritious Offering inadequate nutrition. underobturation Insufficient obturation; an imperfect stopping up, or underfilling. underoccupancy The occupancy of a building by fewer people than it could reasonably house. underoccupation Insufficient occupation; the state of being occupied by too few. underoccupied Not occupied enough, especially of a building with housing units. underofficer A subordinate officer. underofficered Having too few officers. underofficial A subordinate official. underogating Not derogating. underogatory Not derogatory. underoil To oil too little. underoos A set of matching briefs and top (usually a sleeveless shirt or T-shirt) themed after a superhero or other fictional character, popular with children in the 1980s. underoperate To perform too few surgical operations. underoptimization The act or process of underoptimizing. underoptimize To optimize to an inadequate degree. underorder To order too little or too few. underorganization Insufficient organization. underorganized Lacking organization. underossified Insufficiently ossified underoxidize To oxidize insufficiently. underoxygenate To oxygenate insufficiently. underoxygenated Having insufficient oxygen. underoxygenation The state of being underoxygenated. underpack To pack too little. underpackage To pack inadequately in too little packaging. underpacker A person who underpacks. underpacking Insufficient, or less than the usual amount of packing underpad A mattress protector. underpadded Having padding underneath. underpadding Material used for underpads. underpaid Getting too little financial compensation for one's work. underpaint To rough in the colors of a painted work of art, prior to painting the final version. underpainting An initial layer of paint, often monochromatic, applied to a ground as a base for subsequent layers. underpair A pocket pair of a lower rank than all of the community cards on the board. underpanted Wearing underpants. underpants Underwear covering the genitalia and often buttocks, usually going no higher than the navel. underparameterization Insufficient parameterization underparameterized Insufficiently parameterized underparent To provide one's child with insufficient attention and nurturing. underparenting Inadequate parenting; failure to interact sufficiently with one's child. underpart To divide (a part) and assign subordinate portions of it. underparticipation Inadequate participation. underpartition To divide into too few partitions. underpass A passage, especially for pedestrians, that crosses underneath a road, railroad or obstacle. underpassage A lower passage. underpasteurized Not adequately pasteurized. underpatronized Not receiving enough clients or customers. underpay To pay (someone) less than the value of their work; to pay (someone) insufficiently. underpayer One who underpays. underpayment An insufficient payment underpeep To peep under. underpeer To look beneath something. underpenalize To penalize insufficiently underpenalized Insufficiently penalized underpenetrated Into which insufficient penetration has been achieved. underpeopled Short of people; underpopulated. underpeopling The state of having too sparse a population. underperceive To perceive to a lesser degree than actually exists. underperception The condition of underperceiving. underperform To underachieve; to fail to reach standards or expectations, especially with respect to a financial investment. underperformance The state or quality of underperforming underperformer One who or that which underperforms, having performance that is below average or below expectations; often specifically a company or stock underperforming That performs less well than required. underperfused Synonym of hypoperfused. underperfusion inadequate perfusion underperson A person of low status. underpersonalization The act of underpersonalizing. underpersonalize To attribute or personalize inadequately. underpetticoat A petticoat worn under a skirt or another petticoat. underpetticoated Wearing an underpetticoat. underphosphorylated Insufficiently phosphorylated. underpier Underneath a pier. underpigmentation Inadequate pigmentation. underpigmented Inadequately pigmented. underpile To strengthen (a building or structure) with piles underneath. underpin To support from below with props or masonry. underpinner One who, or that which, underpins. underpinning A support or foundation, especially as a structure of masonry that supports a wall. underpitched Given too low a pitch. underplace To place too low in a ranking. underplacement Placement below or subordinate to others. underplan To plan insufficiently. underplant To plant underneath. underplanting An arrangement of underplants. underplate An armoured plate that forms part of a mortice lock. underplating the formation of an underplate underplay The act of underplaying. underplot A subplot; a plot that is not the main plot of a story. underplotted Lacking in plot. underplotter One who underplots; a schemer. underplumage Synonym of underfeathering. underpoint A downward facing point on the underside. underpolice To police too little. underpoliced Inadequately policed. underpolluted Having relatively low pollution. underpollution A relatively low level of pollution. underpopulate To populate with too few individuals. underpopulated Having an insufficient population for economic viability underpopulation Insufficient population. underporter A subordinate porter. underportion The lower portion of something; the underneath. underpot To place (a plant) in too small a pot. underpotential A potential (for the deposition of a metal on a surface) that is greater than that predicted by the Nernst equation. underpotentially By employing an underpotential underpour To pour an inadequate amount. underpower To supply with insufficient power. underpowered Having insufficient power for its operation. underpraise To praise too little. underprecision inadequate precision underpredict To predict to be smaller than is the case underpredicted predicted to be smaller than reality underpredicting predicting something to be less that it actually is underprediction A prediction that is smaller than the true value. underpredictor One who underpredicts. underprefect A subordinate prefect. underprenylate To prenylate insufficiently underprenylated Insufficiently prenylated underprenylation Insufficient prenylation / isoprenylation underpreparation insufficient preparation underprepared Not adequately prepared. underpreparedness State or condition of being underprepared. underprescribe To prescribe (a drug) less frequently than appropriate (as operationally defined, for example, by absence of prescription despite an approved indication and without any documented rationale for the overriding medical opinion). underprescription Failure to prescribe a drug as often as appropriate, where the appropriateness is defined by concepts such as standard of care, clinical guideline recommendations, or similar. underpresence An underlying presence. underpressure insufficient pressure; a marked drop in pressure underpressurization Inadequate pressurization. underpressurize To bring to too low a pressure. underpressurized Insufficiently pressurized. underprice To set a price at less than the value or cost of an item. underpriced Having a relatively or abnormally low price.