Where does “-ique” come from?

-ique (Middle English) comes from Middle English -ik, from Old French -ique, from Latin -icus, from Proto-Italic *-ikos — forms adjectives with the sense of 'of or pertaining to'.

-ique (Middle English): Alternative form of -ik

Definitions

Alternative form of -ik

Ancestry of “-ique”, step by step

Step	Language	Word	Meaning
1	Middle English	-ik	Alternative form of -y; Forms nouns denoting a...
2	Old French	-ique	-ic
3	Latin	-icus	belonging to; derived from; of or pertaining to;...
4	Proto-Italic	*-ikos	forms adjectives with the sense of 'of or pertaining to'

Every word from Proto-Italic *-ikos →Every word from Latin -icus →Every word from Old French -ique →