极其 (jí qí): cực kỳ

This exam was extremely easy; I finished it in less than half an hour.

He is extremely passionate about music and practices the piano for four hours every day.

The scenery there is extremely beautiful and has attracted many tourists to come and take photos.

This math problem is extremely complex; even the teacher took a long time to solve it.

The old man extremely patiently taught the children how to play chess, explaining the rules over and over again.