take the liberty of Definition

liberty
noun liberties

1. Freedom from captivity, slavery, restrictions, etc.

Thesaurus: freedom, emancipation, release.
2. Freedom to act and think as one pleases.

Thesaurus: freedom, emancipation, autonomy, independence, licence, leave.
3. A natural right or privilege. See civil liberty.

Thesaurus: right, prerogative, privilege.
Form: liberties (usually)
4. An action or utterance thought of as over-familiar or presumptuous.

Idiom: at liberty

Free from prison or control;
Thesaurus: free, on the loose, at large, unconstrained, unrestricted.

Allowed or permitted (to).
Example: at liberty to use the company car

Idiom: take liberties

To treat someone with too much familiarity; to be too presumptuous or impertinent.

To act in an unauthorized way; to be deliberately inaccurate.

Idiom: take the liberty to (take the liberty of)

To do or venture to do something, usually without permission.

Etymology: 14c: from Latin liber free.