Douglas Harper's Etymology Dictionary
capiche
1940s slang, from Italian capisci? "do you understand?" from capire "to understand," from Latin capere "seize, grasp, take" (see capable). Also spelled coppish, kabish, capeesh, etc.
Wiktionary
capiche
interj. (context chiefly US English) (alternative form of capisce English)
Usage examples of "capiche".
They need to be kneeding the same words for same things, need to capiche what they wanna do, have a handle on what secret rules say no 2 if you know, and a troo digging of the ground game stands on, air game breathes.
Did those straights back on Earth really think they had a strong enough capiche on this thing to pry the hole open big enough for something the size of a hab to punch through?