underneath

1. not comparableBelow; in a place beneath.

   I can't take my sweater off: I amn't wearing anything else on underneath.

   2 more examples

   I lifted up the pile of clothes, and underneath, on the floor, was a dark red stain.

   connected with it underneath, you see a very fine hair-spring.

   1825, Isaac Taylor, Scenes of British Wealth: In Produce, Manufactures, and Commerce, for the Amusement and Instruction of Little Tarry At-home Travellers

2. not comparableOn the underside or lower face.

   No insects exhibit, like them, what may be termed four net-work eyes. It is very easy to perceive them in looking at the animal from above, and then examining it underneath

   1832, Georges Cuvier, translated by Edward Griffith, edited by Georges Cuvier, Edward Pidgeon, and Edward Griffith, The Animal Kingdom: Arranged in Conformity with Its Organization, volume 14, published 2012, →ISBN

1. Under, below, beneath.

   We flew underneath the bridge.

   2 more examples

   Underneath the water, all was calm.

   We looked underneath the table.

2. Under the control or power of.

   There was little freedom underneath the Nazi jackboot.

1. not comparableUnder, lower.

   You can have the underneath bunk.

   2 more examples

   The underneath part is harder to reach.

   The mess in the kitchen was one thing. The way the place smelled was another—some sort of chemistry-lab stink on top, some other smell underneath it. He was afraid the underneath smell might be blood.

   1990, Stephen King, The Moving Finger

plural underneaths

1. uncountableusuallyThe bottom of something.

   The underneath of the aircraft was painted blue.

   4 more examples

   Nawnim yelped, heaved away, struck his head on the underneath of the bed, and rolled into view bawling.

   1938, Xavier Herbert, chapter V, in Capricornia, page 64

   It was a monolith of a golden color, opening at its base on to a cavern: its underneath was hollowed out by water.

   2002, Mary Ann Caws, Surrealist Painters and Poets: An Anthology, page 229

   I have been looking for an underneath I couldn't see.

   2010, Molly Brodak, A Little Middle of the Night, page 13

   they harden up a little as they cool, and they should be damp within; that's what makes them chewy, so don't worry that the underneaths of the macaroons look sticky.

   2011, Nigella Lawson, Nigella Express: Good Food Fast

2. uncountableusuallyA background radio sound track played during a specific announcement or program.

   The underneath is music from the latest album by ….

   2009, Jay Trachtenberg (radio host), KUT-FM Radio, Austin, Texas, 17 Dec.