watchful
adjective/ˈwɒtʃfl/
/ˈwɑːtʃfl/
- 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.
- She seemed watchful and slightly worried.
Oxford Collocations DictionaryWatchful is used with these nouns:- eye
- gaze
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watchful