关键

guānjiàn

-

noun; adjective

Definitions:

(1) Crucial; key; pivotal

Example sentences:
1. 这是关键问题 zhè shì guān jiàn wèn tí This is a key issue.
2. 这是他成功的关键 zhè shì tā chéng gōng de guān jiàn This is the key to his success.
3. 关键在于努力 guān jiàn zài yú nǔ lì The key is to work hard.
HSK Level:

4