Word: 必不可少 (bìbùkěshǎo) 必不可少 dictionary entry bìbùkěshǎo absolutely necessary; indispensable; essential Full dictionary entry for 必不可少 Example sentences using 必不可少 2 sentences, showing page 1 of 1. 出国旅行，护照是必不可少的。 Chūguó lǚxíng, hùzhào shì bìbùkěshǎo de. A passport is absolutely necessary when traveling abroad. 睡眠对健康来说是必不可少的。 Shuìmián duì jiànkāng lái shuō shì bìbùkěshǎo de. Sleep is essential for good health.