1. Not learned; untaught; uneducated; ignorant; illiterate.

2. Not gained by study; not known.

3. Not exhibiting learning; as, unlearned verses.
— Un*learn"ed*ly, adv.
— Un*learn"ed*ness, n.

UNLEASH
Un*leash", v. t. Etym: [1st pref. un- + leash.]

Defn: To free from a leash, or as from a leash; to let go; to release; as, to unleash dogs.

UNLEAVENED
Un*leav"ened, a.

Defn: Not leavened; containing no leaven; as, unleavened bread.

UNLESS Un*less", conj. Etym: [Formerly, onles, onlesse, onlesse that, that is, in less, in a less case. See On, and Less.]

Defn: Upon any less condition than (the fact or thing stated in the sentence or clause which follows); if not; supposing that not; if it be not; were it not that; except; as, we shall fail unless we are industrious.

Note: By the omission of the verb in the dependent clause, unless was
frequently used prepositionally, — a construction common in
Shakespeare and still employed colloquially.
Here nothing breeds unless the nightly owl. Shak.