The difference between Unsay and Withdraw

When used as verbs, unsay means to withdraw, retract (something said), whereas withdraw means to pull (something) back, aside, or away.

check bellow for the other definitions of Unsay and Withdraw

Unsay as a verb:

To withdraw, retract (something said).
Unsay as a verb:

To not have said (since this is physically impossible usually in the subjunctive, as I wish I could unsay).

Examples:

"There are somethings I'd like to unsay... to my boss... right before he decided to fire me."

Withdraw as a verb (transitive):

To pull (something) back, aside, or away.
Withdraw as a verb (intransitive):

To stop talking to, or interacting with, other people and start thinking thoughts that are not related to what is happening around.
Withdraw as a verb (transitive):

To take back (a comment, etc).

Examples:

"to withdraw false charges"
Withdraw as a verb (transitive):

To remove, to stop providing (one's support, etc).
Withdraw as a verb (transitive):

To extract (money from an account).
Withdraw as a verb (intransitive):

To retreat.
Withdraw as a verb (intransitive):

To be in withdrawal from an addictive drug etc.