incapable of changing or being altered / irrevocable or irreversible

Of a word, having no diacritical mark; accentless. / Of a vowel or syllable, pronounced with no, or little stress. / Not pronounced with a distinctive accent.

The condition of agreement by all parties, the state of being unanimous.

(of metal) Not alloyed; not in mixture with other metals; pure. / Complete and unreserved; pure; unadulterated; not restricted, modified, or qualified by reservations.

Fruitless, futile, useless.

In an unabashed manner; without embarrassment or hesitation.

Not attached or joined; disconnected. / Not married and not involved in a romantic relationship. / Not connected with or belonging to a particular group or organization. / (obsolete) Not seized for debt.

simple past tense and past participle of unattach

(advertising) In advertising research, recognition of a specific brand or product without being prompted with possible names.

Not answerable; impossible to answer. / Impossible to dispute or rebut; irrefutable; conclusive.