出典:Wiktionary
From Middle English beslepen, from 古期英語 beslǣpan (“to sleep, sleep through, sleep over”), equivalent to be- + sleep. Compare West Frisian besliepe (“to sleep with”), Dutch beslapen (“to sleep with”), German beschlafen (“to lay with”).
besleep (三人称単数 現在形 besleeps, 現在分詞 besleeping, 過去形および過去分詞形 beslept)