How do you say “Lose” in Japanese?「失う(うしなう)」Ushinau/「無くす(なくす)」Nakusu
"Lose" is「失う(うしなう)」or「無くす(なくす)」in Japanese. 「(私は)あなたを失うなんて考えられません。」means "I can't imagine losing you."「菅野さんは池にスマホを落として無くした。」means "Kanno-san dropped his smartphone in the pond and lost it."