Full of watch; vigilant; attentive; careful to observe closely; observant; cautious; -- with of before the thing to be regulated or guarded; as, to be watchful of one's behavior; and with against before the thing to be avoided; as, to be watchful against the growth of vicious habits.
The difference between being a victim and a survivor is often a low level of situational awareness. You can't be a super-spy, watchful and paranoid every day. But I am more watchful than the average American. Barry Eisler
Some animals are cunning and evil-disposed, as the fox; others, as the dog, are fierce, friendly, and fawning. Some are gentle and easily tamed, as the elephant; some are susceptible of shame, and watchful, as the goose. Some are jealous and fond of ornament, as the peacock. Aristotle
Nothing dates one so dreadfully as to think someplace is uptown. At our age one must be watchful of these conversational gray hairs. Ruth Gordon
There are times when fear is good. It must keep its watchful place at the heart's controls. Aeschylus
Unless you become more watchful in your states and check the spirit of monopoly and thirst for exclusive privileges you will in the end find that... the control over your dearest interests has passed into the hands of these corporations. Andrew Jackson