watchful

/wˈɒt‍ʃfə‍l/

/ˈwɑtʃfəɫ/

watchful

paying close attention to one's surroundings or circumstances to stay aware of potential risks or threats

synonyms : alert

antonyms : unalert

experiencing or accompanied by sleeplessness

synonyms : insomniac

Examples

1. We sat around the campfire, roasting marshmallows under the watchful presence of the towering single-leaf pinyon trees.

2. Keep watchful.

3. Two of the architects of the operation kept a watchful eye on proceedings.

4. Third, keep a watchful eye for tricks.