/ ˈwɒtʃfl; NAmE ˈwɑːtʃ-; ˈwɔːtʃ-/ adjective
paying attention to what is happening in case of danger, accidents, etc. :
Her expression was watchful and alert.
His mother kept a watchful eye on him.
The children played under the watchful eye of their teacher.
► watch·ful·ly / -fəli; NAmE / adverb
► watch·ful·ness noun [ U ]