[adj] 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" [adj] openly distrustful and unwilling to confide
distrustful, leery, mistrustful, on guard, on one's guard(p), on your guard, shy, suspicious, untrusting, upon one's guard(p)
unwary