Answer: wariest

AnswerCrossword Clue
WARIESTLeast trustful
WARIESTMost cagey.
WARIESTMost cautious.
WARIESTLeast gullible.
WARIESTMost cautious
WARIESTMost chary
WARIESTLeast trusting
WARIESTLeast confident
wariestWARY, watchful (closely alert)
wariestcareful
wariestwatchful