Word: 遗失 (yíshī) Traditional: 遺失 遗失 dictionary entry yíshī to lose Full dictionary entry for 遗失 Example sentences using 遗失 2 sentences, showing page 1 of 1. 谁遗失了这把钥匙？ Shéi yíshī le zhè bǎ yàoshi? Who lost this key? 钱包在地铁上遗失了。 Qiánbāo zài dìtiě shàng yíshī le. My wallet was lost on the subway.