Where does “méthanique” come from?

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

méthanique (French): methanic

Definitions

methanic

Ancestry of “méthanique”, step by step

Step	Language	Word	Meaning
1	French	-ique	Used to form adjectives from nouns: -ic, -ical,...
2	Middle French	-ique	ic
3	Old French	-ique	-ic
4	Latin	-icus	belonging to; derived from; of or pertaining to;...
5	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 French -ique →