Where does “trông nom” come from?

trông nom (Vietnamese) comes from Vietnamese Nôm, from Old Portuguese non, from Latin nōn, from Old Latin noenum, from Proto-Indo-European óynos — one; single.

trông nom (Vietnamese): to look after; to take care of; to nurture

Definitions

to look after; to take care of; to nurture

Ancestry of “trông nom”, step by step

trông nom traces back through two separate lines of ancestry.

via Vietnamese Nôm

Step	Language	Word	Meaning
1	Vietnamese	Nôm	written in Vietnamese using chữ Nôm
2	Old Portuguese	non	no, not
3	Latin	nōn	not
4	Old Latin	noenum	—
5	Proto-Indo-European	óynos	one; single

via Vietnamese trồng

Step	Language	Word	Meaning
1	Vietnamese	trồng	to plant
2	Proto-Vietic	k-lɔːŋ	clear; limpid; inside
3	Proto-Mon-Khmer	kluuŋ	inside, middle

Every word from Proto-Indo-European óynos →Every word from Old Latin noenum →Every word from Latin nōn →