"drowsier" in the adjective sense
1. drowsy, drowsing, dozy
"made drowsy by the long ride"
"it seemed a pity to disturb the drowsing (or dozing) professor"
"a tired dozy child"
"the nodding (or napping) grandmother in her rocking chair"
2. drowsy, oscitant, yawning
showing lack of attention or boredom
"the yawning congregation"
Source: WordNet® (An amazing lexical database of English)
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