ロスト

ロ

ス

ト

Freq.FrequencyTop 20,000

ロストする · noun or participle which takes 'suru'

Meanings

Noun meaning loss or being lost; usually appears in compounds such as ロストバゲージ (lost baggage) or ロストテクノロジー (lost technology).

Transitive suru-verb meaning to lose something, often used in technical or business contexts (e.g., losing data, items, or opportunities).

〈物もの〉をロストするto lose something (data, an item, an opportunity)
サーバーの不ふ具ぐ合あいで重じゅう要ようなデータをロストしてしまった。
Because of a server glitch, we ended up losing important data.
〈物もの〉がロストするfor something to become lost (of items, signals, etc.)
飛ひ行こう機きで荷に物もつがロストしたらしい。
It seems my luggage got lost on the flight.

失うしなうN3sense 2
失う is the everyday Japanese verb for losing something, while ロスト is a loanword typically confined to technical or business jargon.
紛ふん失しつN1sense 1
紛失 is the formal, often written term for losing an item (as in official reports), whereas ロスト is a casual, borrowed alternative used in tech or business speech.

獲かく得とくN1sense 2
獲得 means to gain or acquire something, the opposite of ロスト's sense of losing or losing out on something.

Borrowed from English 'lost' or 'loss,' used as a noun and suru-verb in Japanese.