Dunk
early 20th century: from Pennsylvanian German dunke ‘dip’, from German tunken ‘dip or plunge’.
wiktionary
From Pennsylvania German dunke, from Middle High German dunken, from Old High German dunkōn(“to dip, submerge, dunk”), from Proto-West Germanic *þunkōn(“to make wet”), possibly from Proto-Germanic *þunkōną, from Proto-Indo-European *teng-(“to moisten, wet”).
Cognate with German tunken(“to dunk”), Latin tingō(“to wet, moisten”), Ancient Greek τέγγω(téngō, “to wet, moisten”). Related to taint, tincture, tint.
etymonline
dunk (v.)
1919, "to dip (something) into a beverage or other liquid," American English, from Pennsylvania German dunke "to dip," from Middle High German dunken, from Old High German dunkon, thunkon "to soak," from PIE root *teng- "to soak" (see tincture). The basketball sense "jump up and push (the ball) down through the basket" is recorded by 1935 as a verb (implied in dunking), 1967 as a noun (earlier dunk shot, 1950). Related: Dunked.
