vigilant
I
adjective
alert, apprehensive, attentive, canny, careful, cautious, circumspect, guarded, heedful, intentus, judicious, keenly aware, observant, on guard, precautious, prescient, provident, providus, prudent, regardful, scrupulous, searching, sharp, suspicious, unsleeping, unslumbering, vigilans, wakeful, wary, watchful, wide awake
II
index
careful, circumspect, conscious (aware), discreet, guarded, leery, meticulous, protective, provident (showing foresight)
Burton's Legal Thesaurus.
William C. Burton.
2006