watchful
//ˈwɒtʃ.fəl//
Adjective
watchfulCanonical form
more watchfulComparative
most watchfulSuperlative
1
Carefully observant or attentive; alert and vigilant, especially to potential danger or trouble.
The watchful guard noticed the suspicious movement near the gate.
2
Characterized by careful observation or close attention.
The teacher kept a watchful eye on the students during the exam.