ratify

Từ điển WordNet v3.1 - WordNet Dictionary

verb

approve and express assent, responsibility, or obligation (Freq. 5)
- All parties ratified the peace treaty
- Have you signed your contract yet?
• Syn:
sign
• Derivationally related forms:
ratification, ratifier, signer (for: sign)
• Hypernyms:
validate, formalize, formalise
• Entailment:
endorse, indorse
• Verb Frames:
- Somebody ----s something