unfasten

Word parts

un- + fasten

Pronunciation

• (US) IPA ^(key): /ʌnˈfɑːs(ə)n/

Verb

Plain form unfasten

Third-person singular unfastens

Past tense unfastened

Past participle unfastened

Present participle unfastening

1. (transitive) If you unfasten something, it means that you are detaching it from another thing; to disconnect.
2. (intransitive) If you are unfastening a rope, it means that you are loosening or untying it.