adder

adder · noun¹

1. Proto-Indo-European · inherited from*n̥h₁trih₂
2. Proto-Germanic · inherited from*nadrǭ
3. Proto-West Germanic · inherited from*nadrā
4. Old English · inherited fromnǣdre“snake”
5. Middle English · inherited fromnadder
6. English todayadder

From Middle English nadder, addere, rebracketing of “a naddere” as “an addere”, from Old English nǣdre (“snake”), from Proto-West Germanic *nadrā, from Proto-Germanic *nadrǭ, from pre-Germanic *néh₁treh₂, variant of Proto-Indo-European *n̥h₁trih₂, from *(s)neh₁- (“to spin, twist”). See also West Frisian njirre, Dutch adder, German Natter, Otter; also Welsh neidr, Latin natrīx (“watersnake”), Dutch naaien.

adder · noun²

From add + -er.

ADDer · noun³

From ADD + -er.