Synonyms and related words :
canny, careful, cautious, circumspect, deliberate, discreet, gingerly, guarded, heedful, hesitant, judicious, leaving out nothing, mindful, noncommittal, on guard, overlooking no possibility, pawky, politic, prudent, regardful, safe, slow to act, tentative, thorough, uncommunicative, undaring, unenterprising, unprecipitate