Where does “làm ơn mắc oán” come from?

làm ơn mắc oán (Vietnamese) comes from Vietnamese làm ơn, from Vietnamese làm, from French lamé, from French -é, from Middle French -é, from Old French -é, from Latin -a, from Proto-Italic -ā.

Ancestry of “làm ơn mắc oán”, step by step

làm ơn mắc oán traces back through two separate lines of ancestry.

via Vietnamese làm ơn

StepLanguageWordMeaning
1Vietnameselàm ơnto do a favour; to do a good turn
2Vietnameselàmto do; to make; to work
3Frenchlamépast participle of lamer
4French-épast participle root verb suffix of regular -er...
5Middle French-épast participle root verb suffix of regular; -ed, -en, -n
6Old French-éused to form past participles of regular -er...
7Latin-asuffixed to the roots of verbs, forms agent...
8Proto-Italic-āForms masculine agent nouns from prefixed or compounded bases
9Proto-Indo-European-éh₂—

via Vietnamese mắc

StepLanguageWordMeaning
1Vietnamesemắcto hang; to hook
Every word from Proto-Indo-European -éh₂ →Every word from Latin -a →Every word from French -é →