"roost" in the noun sense
1. roost
a shelter with perches for fowl or other birds
2. roost
a perch on which domestic fowl rest or sleep
"roost" in the verb sense
1. perch, roost, rest
sit, as on a branch
"The birds perched high in the tree"
2. roost
settle down or stay, as if on a roost
Source: WordNet® (An amazing lexical database of English)
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