Oblige
来自Big Physics
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Middle English (in the sense ‘bind by oath’): from Old French obliger, from Latin obligare, from ob- ‘towards’ + ligare ‘to bind’.
wiktionary
From Middle English obligen, from Old French obligier, obliger, from Latin obligo, obligare, from ob- + ligo. Doublet of obligate, taken straight from Latin.
etymonline
oblige (v.)
c. 1300, obligen, "to bind by oath, put under moral or legal obligation, devote," from Old French obligier "engage one's faith, commit (oneself), pledge" (13c.), from Latin obligare "to bind, bind up, bandage," figuratively "put under obligation," from ob "to" (see ob-) + ligare "to bind," from PIE root *leig- "to tie, bind." Main modern meaning "to make (someone) indebted by conferring a benefit or kindness" is from 1560s.
