Webster's Revised Unabridged Dictionary · 1913

Untie

Untie , transitive verb

[Anglo-Saxon untȳgan. See 1st Un-, and Tie, transitive verb]

1.
To loosen, as something interlaced or knotted; to disengage the parts of; as, to untie a knot.
Sacharissa's captive fain Would untie his iron chain. — Waller
Her snakes untied, sulphurous waters drink. — Pope
2.
To free from fastening or from restraint; to let loose; to unbind.
Though you untie the winds, and let them fight Against the churches. — Shakespeare
All the evils of an untied tongue we put upon the accounts of drunkenness. — Jer. Taylor
3.
To resolve; to unfold; to clear.
They quicken sloth, perplexities untie. — Denham

Untie , intransitive verb

To become untied or loosed.