The kkochi in "kkochi-kkochi caemutda" (to grill someone with questions) is, it turns out, a pointed skewer! "Kkochi-kkochi" is an adverb made by doubling kkochi, the word for "skewer." The sharp, piercing nature of a skewer carries straight over, giving us the sense of "probing and questioning with keen, cutting precision." Trace the etymology further back and it gets remarkable. Kkochi comes from the Middle Korean got, and that got originally meant "a strip of land jutting out into the sea" — the very same word as the "cape" (岬) you see on maps today! It shifted got → goji → gochi → kkochi, and food threaded onto a skewer also became kkochi (as in meat or fish-cake skewers). So the got in "Jangsangot," the kkochi in "dak-kkochi" (chicken skewer), and the kkochi in "kkochi-kkochi caemutda" all share a single root. One old word branched out into land, food, and a turn of phrase.