untying

Từ điển WordNet v3.1 - WordNet Dictionary

noun

loosening the ties that fasten something
- the tying of bow ties is an art; the untying is easy
• Syn:
undoing, unfastening
• Derivationally related forms:
unfasten (for: unfastening), undo (for: undoing), untie
• Hypernyms:
loosening, laxation