Where does “cũ mèm” come from?

cũ mèm (Vietnamese) comes from Vietnamese cú, from French coup, from Old French colp, from Latin colpus, from Ancient Greek κόλπος, from Proto-Indo-European kʷelp-, from Proto-Indo-European kʷel- — to turn.

cũ mèm (Vietnamese): so old that it should have been discarded or replaced long ago

Definitions

so old that it should have been discarded or replaced long ago

Ancestry of “cũ mèm”, step by step

cũ mèm traces back through two separate lines of ancestry.

via Vietnamese cú

Step	Language	Word	Meaning
1	Vietnamese	cú	an owl; hoot; to knuckle one's head
2	French	coup	blow, hit, strike; fast and instantaneous action;...
3	Old French	colp	strike; hit
4	Latin	colpus	stroke; strike; hit
5	Ancient Greek	κόλπος	bosom, lap; a fold in fabric around the bosom;...
6	Proto-Indo-European	kʷelp-	to bend; to curve, arch
7	Proto-Indo-European	kʷel-	to turn

via Vietnamese mèm

Step	Language	Word	Meaning
1	Vietnamese	mèm	very

Every word from Proto-Indo-European kʷel- →Every word from Proto-Indo-European kʷelp- →Every word from Ancient Greek κόλπος →