likely vs unlikely

likely and unlikely both are adjectives.

Word	Noun	Adjective	Verb	Adverb
likely	No	Yes	No	Yes
unlikely	No	Yes	No	No

likely (adjective)	unlikely (adjective)
has a good chance of being the case or of coming about	has little chance of being the case or coming about
within the realm of credibility	not likely to be true or to occur or to have occurred
expected to become or be; in prospect	having a probability too low to inspire belief

likely (adverb)	unlikely (adverb)
with considerable certainty; without much doubt