Where does “gắng sức” come from?

gắng sức (Vietnamese) comes from Vietnamese găng, from French gant, from Latin wantus, from Frankish wantu, from Proto-Germanic wantuz, from Proto-Indo-European wondʰnú-, from Proto-Indo-European wendʰ- — to wind, to turn.

gắng sức (Vietnamese): to make every effort; to do one's best; to try hard; to strain every nerve

Definitions

to make every effort; to do one's best; to try hard; to strain every nerve

Ancestry of “gắng sức”, step by step

gắng sức traces back through two separate lines of ancestry.

via Vietnamese găng

Step	Language	Word	Meaning
1	Vietnamese	găng	glove; tight; tense; strained; tightly; tensely;...
2	French	gant	glove
3	Latin	wantus	glove
4	Frankish	wantu	glove; mitten; glove
5	Proto-Germanic	wantuz	glove, mitten
6	Proto-Indo-European	wondʰnú-	glove
7	Proto-Indo-European	wendʰ-	to wind, to turn

via Vietnamese sức

Step	Language	Word	Meaning
1	Vietnamese	sức	strength; power
2	Proto-Vietic	k-rək	strong
3	Old Chinese	力	—

Every word from Proto-Indo-European wendʰ- →