Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
wakeful is an adjective meaning "carefully observant or attentive; on the lookout for possible danger". It carries 3 recorded senses.
carefully observant or attentive; on the lookout for possible danger
“a policy of open-eyed awareness”
“the vigilant eye of the town watch”
“there was a watchful dignity in the room”
“a watchful parent with a toddler in tow”
(of sleep) easily disturbed
“in a light doze”
“a light sleeper”
“a restless wakeful night”
Definitions, synonyms and semantic relations for wakeful come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.