駆使 くし
kushi

Noun
Suru Verb

1. using freely; making full use of; having a good command of

Transitive
かれ英語 えうご自由 じゆう駆使 くしする。
karewa ēgō jiyūni kushi suru.
He has a perfect command of English.
Noun
Suru Verb

2. working (someone) hard; driving (someone) on

Transitive