Synonyms:
alert, watchful
Meaning: engaged in or accustomed to close observation; "caught by a couple of alert cops"; "alert enough to spot the opportunity when it came"; "constantly alert and vigilant, like a sentinel on duty"
Synonyms:
insomniac, sleepless, watchful
Meaning: experiencing or accompanied by sleeplessness; "insomniac old people"; "insomniac nights"; "lay sleepless all night"; "twenty watchful, weary, tedious nights"- Shakespeare
Usage examples
Smith is keeping a watchful eye on our interests.'"
You may rely on me to keep a watchful eye on your interests.
"To earn it?" said Don Diego, and the watchful blue eyes did not miss the quiver that ran through him.
There was once a Wolf who got very little to eat because the Dogs of the village were so wide awake and watchful.
But you know well enough, that had we been disposed, we had no opportunity for it, from your watchful care and circumspection.
Selwyn's force, from end to end, was composed of able men who did a full day's work under the eye of their watchful taskmaster.
Pennell is truly excellent in his present position--he's invariably cheerful, unceasingly watchful, and continuously ready for emergencies.
You loved against the world, and these two loved AT me. They had their business with one another, under the threat of a watchful fierceness.
The corollary to all this is, that, if charged, you must keep cool and watchful, and your chance of escape is far greater than non-sportsmen would imagine.
"Should you require your dog to be watchful at night, feed him in the morning; if you would have him quiet at night, feed him late, and don't leave him bones to gnaw.