The difference between Loose and Undo

When used as nouns, loose means the release of an arrow, whereas undo means an operation that reverses a previous action.

When used as verbs, loose means to let loose, to free from restraints, whereas undo means to reverse the effects of an action.

Loose is also interjection with the meaning: begin shooting.

Loose is also adjective with the meaning: not fixed in place tightly or firmly.

check bellow for the other definitions of Loose and Undo

Loose as a verb (transitive):

To let loose, to free from restraints.
Loose as a verb (transitive):

To unfasten, to loosen.
Loose as a verb (transitive):

To make less tight, to loosen.
Loose as a verb (intransitive):

Of a grip or hold, to let go.
Loose as a verb (archery):

to shoot (an arrow)
Loose as a verb (obsolete):

To set sail.
Loose as a verb (obsolete):

To solve; to interpret.

Examples:

"rfquotek Spenser"

Loose as an adjective:

Not fixed in place tightly or firmly.

Examples:

"This wheelbarrow has a loose wheel."
Loose as an adjective:

Not held or packaged together.

Examples:

"You can buy apples in a pack, but they are cheaper loose."
Loose as an adjective:

Not under control.

Examples:

"The dog is loose again."
Loose as an adjective:

Not fitting closely

Examples:

"I wear loose clothes when it is hot."
Loose as an adjective:

Not compact.

Examples:

"It is difficult walking on loose gravel."

"a cloth of loose texture"
Loose as an adjective:

Relaxed.

Examples:

"She danced with a loose flowing movement."
Loose as an adjective:

Not precise or exact; vague; indeterminate.

Examples:

"a loose way of reasoning"
Loose as an adjective:

Indiscreet.

Examples:

"Loose talk costs lives."
Loose as an adjective (dated):

Free from moral restraint; immoral, unchaste.
Loose as an adjective (not comparable, sports):

Not being in the possession of any competing team during a game.

Examples:

"He caught an elbow going after a loose ball."

"The puck was momentarily loose right in front of the net."
Loose as an adjective (dated):

Not costive; having lax bowels.

Examples:

"rfquotek John Locke"

Loose as a noun (archery):

The release of an arrow.
Loose as a noun (obsolete):

A state of laxity or indulgence; unrestrained freedom, abandonment.
Loose as a noun (rugby):

All play other than set pieces (scrums and line-outs).
Loose as a noun:

Freedom from restraint.

Examples:

"rfquotek Prior"
Loose as a noun:

A letting go; discharge.

Examples:

"rfquotek Ben Jonson"

Undo as a verb:

To reverse the effects of an action.

Examples:

"Fortunately, we can undo most of the damage to the system by the war."
Undo as a verb:

To unfasten.

Examples:

"Could you undo my buckle for me?"
Undo as a verb (figuratively):

To impoverish or ruin, as in reputation; to cause the downfall of.

Undo as a noun (computing):

An operation that reverses a previous action.

Examples:

"How many undos does this program support?"