1. Not likely; improbable; not to be reasonably expected; as, an unlikely event; the thing you mention is very unlikely.
2. Not holding out a prospect of success; likely to fail; unpromising; as, unlikely means. Hooker.
3. Not such as to inspire liking; unattractive; disagreeable. [Obs.] "The unlikely eld of me." Chaucer.
UNLIKELY
Un*like"ly, adv.
Defn: In an unlikely manner.
UNLIKEN
Un*lik"en, v. t. Etym: [1st pref. un- + liken.]
Defn: To make unlike; to dissimilate. [Obs.] Wyclif.
UNLIKENESS
Un*like"ness, n.
Defn: The quality or state of being unlike; want of resemblance; dissimilarity. Tennyson.
UNLIMBER
Un*lim"ber, v. t. Etym: [1st pref. un- + limber.] (Mil.)