As a noun, bail is money or a promise given to a court to make sure a person returns for trial after being released from jail. As a verb, to bail can mean to release someone on bail, or informally, to suddenly leave or give up on something.
From Old French “baille,” meaning “custody” or “charge,” from “baillier,” to deliver or hand over. It’s related to “bailiff,” a person who has custody or guardianship.
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