Below are possible answers for the crossword clue On one's guard.
5 letter answer(s) to on one's guard
LEERY
openly distrustful and unwilling to confide
4 letter answer(s) to on one's guard
WARY
marked by keen caution and watchful prudence; "they were wary in their movements"; "a wary glance at the black clouds"; "taught to be wary of strangers"
openly distrustful and unwilling to confide
Other crossword clues with similar answers to 'On one's guard'