Archaic past tense of compromit; bound oneself through mutual agreement or promise.
From 'compromit' in the past tense, formed by adding '-ed.' Represents obsolete conjugation of this Latinate verb form.
This spelling with double-t is interesting—it follows an old English pattern where past tenses would double the final consonant before adding -ed. This rule still applies in modern English for short verbs like 'commit' (committed), but most longer or archaic verbs don't follow it anymore.
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