极为 (jí wéi): cực kỳ

This exam is extremely important; it determines whether I can graduate smoothly.

In extremely cold weather, the workers still persisted in working outdoors.

He takes every practice session extremely seriously and never slacks off.

The success of this project cannot be separated from the team's extremely close cooperation.

She was extremely moved because her friends lent a helping hand when she was in her toughest spot.