Where does “pilonidal” come from?

pilonidal (English) comes from Latin nīdus, from Proto-Italic nizdos, from Proto-Indo-European nisdós, from Proto-Indo-European h₁ni, from Proto-Indo-European h₁én — in.

pilonidal (English): Having body hairs which have grown in a...

Definitions

Having body hairs which have grown in a...

Ancestry of “pilonidal”, step by step

Step	Language	Word	Meaning
1	Latin	nīdus	nest
2	Proto-Italic	nizdos	nest
3	Proto-Indo-European	nisdós	nest
4	Proto-Indo-European	h₁ni	down
5	Proto-Indo-European	h₁én	in

Every word from Proto-Indo-European h₁én →Every word from Proto-Indo-European h₁ni →Every word from Proto-Indo-European nisdós →