J-1 Vocabulary: Words with roots val (to be strong or to be worth and vinc (to conquer)

ambivalence

simultaneous existence of conflicting feelings or thoughts about someone or something; uncertainty or indecision

valedictory

bidding farewell

evaluation

act of judging the value of worth of; the result of evaluating; an appraisal

invalidate

to weaken or destroy the cogency or validity of; to nullify

prevail

to be greater in strength or influence; to triumph

evince

to show or exhibit, as an emotion; to demonstrate clearly or convincingly

vanquish

to defeat in battle or conflict; to overcome or subdue

avail

use, benefit, or advantage-noun
to be of use or advantage; to help-verb

equivalent

equal in quantity, force, meaning, or value

invaluable

of inestimable use or help; indispensable; priceless; having great value