Verb > Enliven

(+ object) to make (something) more interesting, lively, or enjoyable He enlivened his speech with a few jokes. a soup enlivened by chili peppers A few touches of color will enliven the room.

Verb > Conjecture

Conjecture is a formal synonym of the verb guess that means “to form an opinion or idea without proof or sufficient evidence.” Some scientists have conjectured that Jupiter’s moon Europa could sustain life.