Unbolt vs Untie - What's the difference?

As verbs the difference between unbolt and untie

is that unbolt is to undo a bolt; to unlock while untie is to loosen, as something interlaced or knotted; to disengage the parts of.

(en verb)

to undo a bolt; to unlock

* Shakespeare

He shall unbolt the gates.

To loosen, as something interlaced or knotted; to disengage the parts of.

to untie a knot

* (rfdate), Waller:

Sacharissa's captive fain / Would untie his iron chain.

To free from fastening or from restraint; to let loose; to unbind.

* Shakespeare, Macbeth , act 4, scene 1:

Though you untie the winds, and let them fight / Against the churches.

* (rfdate), Jeremy Taylor:

All the evils of an untied tongue we put upon the accounts of drunkenness.

To resolve; to unfold; to clear.

* (rfdate), Denham:

They quicken sloth, perplexities untie .

To become untied or loosed.

* tie