LIKELIEST
Adjective
likeliest
superlative form of likely: most likely
Source: Wiktionary
LIKELY
Like"ly, a. [Compar. Likelier; superl. Likeliest.] Etym: [That is,
like-like. See Like, a.]
1. Worthy of belief; probable; credible; as, a likely story.
It seems likely that he was in hope of being busy and conspicuous.
Johnson.
2. Having probability; having or giving reason to expect; -- followed
by the infinitive; as, it is likely to rain.
3. Similar; like; alike. [Obs.] Spenser.
4. Such as suits; good-looking; pleasing; agreeable; handsome. Shak.
Milton.
5. Having such qualities as make success probable; well adapted to
the place; promising; as, a likely young man; a likely servant.
Like"ly, adv.
Definition: In all probability; probably.
While man was innocent he was likely ignorant of nothing that
imported him to know. Glanvill.
Source: Webster’s Unabridged Dictionary 1913 Edition