Commitment

wiktionary

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commit +‎  -ment

etymonline

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commitment (n.)

1610s, "action of officially consigning to the custody of the state," from commit + -ment. (Anglo-French had commettement.) Meaning "the pledging or engaging of oneself, a pledge, a promise" is attested from 1793; hence, "an obligation, an engagement" (1864).