IPA: //ʌnˈriːv//
KK: /ʌnˈriv/
To become unthreaded or to have a rope removed from a block or pulley.
The sailor had to unreeve the rope from the pulley before continuing with the repairs.
Past: unreeved
Past Participle: unreeved
To take a rope out of a fitting or opening, like a block or thimble.
The sailor had to unreeve the rope to fix the sail.
Past: unreeved
Past Participle: unreeved
Unreeve → It is formed from "un-" (meaning not) and "reeve" (from Old English "rēafian", meaning to unfasten or to remove). The word "unreeve" means to not fasten or to unfasten something that has been fastened.
Think of 'not' ('un-') fastening or 'removing' ('reeve') something — that's what unreeve means.