Circumspect, a.
Etymology: [L. circumspectus, p. p. of circumspicere to look about one's self, to observe; circum + spicere, specere, to look. See Spy.]
Attentive to all the circustances of a case or the probable consequences of an action; cautious; prudent; wary.
Syn. -- See Cautious.
Shades of meaning
Fernald has no entry of its own for circumspect; he lists it under vigilant.
He lists it without comment; the entries above explain its neighbors.