Third-person singular simple present indicative form of busy.(verb)
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Use "busies" in a sentence
"She lowers her head, busies herself looking through the appointment book."
"She busies herself reading and responding back, which shuts her up for a while."
"To address some comments: ISS's orbit is no 'backwater LEO'; Actually it's 'prime LEO' in some sense (i.e. earth observation, busies launch sites accessibility)"