open to more than one interpretation

sin.- obscure

ant.-certain

to give in

sin.- acquiesce

ant.-perservere

to put off to another time

sin.- delay

ant.- advance

to fluctuate between one thing and another

sin.-indecision

ant.-certainty

of questionable quality or trueth

sin.-doubtful

ant.- definate

tiredness or weakness

sin.- slugishness

ant.- energize