Where does “butterworm” come from?

butterworm (English) comes from English Butter, from English butt, from Middle English butten, from Anglo-Norman buter, from Old French boter, from Old French bouter, from Frankish bautan, from Proto-West Germanic bautan — to grow, swell; to swell, wax, grow; to blow; to...

butterworm (English): The caterpillar of the Chilean moth Chilecomadia moorei

Definitions

  1. The caterpillar of the Chilean moth Chilecomadia moorei

Ancestry of “butterworm”, step by step

butterworm traces back through two separate lines of ancestry.

via English Butter

StepLanguageWordMeaning
1EnglishButterA soft, fatty foodstuff made by churning the cream of milk (generally cow's milk)
2EnglishbuttThe larger or thicker end of something; the blunt...
3Middle Englishbutten
4Anglo-Normanbuterto strike, finish
5Old Frenchboterto push, butt, strike; to strike; to push; thrust
6Old Frenchbouterto strike; to hit; to place; to put; to enter
7Frankishbautanto push, strike, beat; to hit, strike; to hit,...
8Proto-West Germanicbautanto beat
9Proto-Germanicbautanąto beat, push
10Proto-Indo-Europeanbʰewd-to hit, strike; to beat, push; to strike, push,...
11Proto-Indo-Europeanbʰew-to grow, swell; to swell, wax, grow; to blow; to...

via English Worm

StepLanguageWordMeaning
1EnglishWormA generally tubular invertebrate of the annelid phylum; an earthworm
2Middle EnglishwormA worm or similar small wormlike animal that...
3Old Englishwyrmcreeping insect; maggot, grub, worm; snake,...
4Old Englishlēahmeadow; clearing with a pigsty; woodland,...
5Proto-West Germaniclauhclearing; meadow
6Proto-Germaniclauhazclearing; meadow
7Proto-Indo-Europeanlówkosclearing; open space, clearing; field, meadow
8Proto-Indo-Europeanlewḱ-lynx
9Proto-Indo-Europeanlewk-bright; to shine; to see
Every word from Proto-Indo-European bʰew-Every word from Proto-Indo-European bʰewd-Every word from Proto-Germanic bautaną