出典:Wiktionary
From Middle English overleven, from 古期英語 oferlǣfan (“to leave over; be left over, remain”), equivalent to over- + leave.
overleave (三人称単数 現在形 overleaves, 現在分詞 overleaving, 過去形および過去分詞形 overleft)
From over- + leave (“permission, furlough”).