Where does “일러스트” come from?

일러스트 (Korean) comes from English illustration, from Middle French illustration, from Latin illūstrātiō, from Latin -tiō, from Latin dissertātiō, from Latin dissertus, from Latin disserere, from Latin dis- — small stone, pebble; gravel, rubble.

Ancestry of “일러스트”, step by step

Step	Language	Word	Meaning
1	English	illustration	The act of illustrating; the act of making clear...
2	Middle French	illustration	—
3	Latin	illūstrātiō	the action of lighting up, brightening
4	Latin	-tiō	tion, -ation, -ing
5	Latin	dissertātiō	(spoken) dissertation, discourse, disquisition
6	Latin	dissertus	arranged, disposed; explained
7	Latin	disserere	second-person singular future passive indicative...
8	Latin	dis-	asunder, apart, in two; reversal, removal;...
9	Latin	calceus	shoe
10	Latin	calx	limestone; chalk; the finish line
11	Ancient Greek	χάλιξ	small stone, pebble; gravel, rubble

Every word from Ancient Greek χάλιξ →Every word from Latin -tiō →Every word from Latin dis- →