必不可少 (bì bù kě shǎo): Absolutely necessary / indispensable — Meaning & Stroke Order

In the era of globalization, mastering a foreign language is an indispensable skill.

Don't you think trust is an absolutely necessary cornerstone for maintaining friendship?

When studying, a good dictionary is an indispensable tool.

Although technology is advanced, face-to-face communication is still indispensable.