chenille (n.)

Proto-Indo-European root meaning "dog."

It forms all or part of: canaille; canary; canicular; canid; canine; chenille; corgi; cynic; cynical; cynosure; dachshund; hound; kennel; Procyon; quinsy.

It is the hypothetical source of/evidence for its existence is provided by: Sanskrit svan-, Avestan spa, Greek kyōn, Latin canis, Old English hund, Old High German hunt, Old Irish cu, Welsh ci, Russian sobaka (apparently from an Iranian source such as Median spaka), Armenian shun, Lithuanian šuo "dog."

"larva of a butterfly or moth," mid-15c., catyrpel, probably altered (by association with Middle English piller "plunderer;" see pillage (n.)) from Old North French caterpilose "caterpillar" (Old French chatepelose), literally "shaggy cat" (probably in reference to the "wooly-bear" variety), from Late Latin catta pilosa, from catta "cat" (see cat (n.)) + pilosus "hairy, shaggy, covered with hair," from pilus "hair" (see pile (n.3)).

Compare also French chenille "caterpillar," literally "little dog." A Swiss German name for it is teufelskatz "devil's cat." "The caterpillar has in many idioms received the name of other animals" [Kitchin, who cites also Milanese cagnon "little dog," Italian dialectal gattola "little cat," Kentish hop-dog, hop-cat, Portuguese lagarta "lizard."] Compare also American English wooly-bear for the hairy variety. An Old English name for it was cawelworm "cole-worm." Caterpillar tractor, one which travels on endless steel belts, is from 1908, so called from its way of moving.