駆く使し

noun, noun or participle which takes 'suru', transitive verb

make full use of; command freely; utilize skillfully

Used for fully utilizing a skill, tool, language, or resource with proficiency and freedom. Often implies mastery or effective deployment.

• 彼かれは英えい語ごを駆く使しして国こく際さい会かい議ぎで発はっ表ぴょうした。

  He made full use of his English to present at the international conference.

• 最さい新しんの技ぎ術じゅつを駆く使しして新しん製せい品ひんを開かい発はつした。

  They developed the new product by making full use of the latest technology.

noun, noun or participle which takes 'suru', transitive verb

work someone hard; drive someone on

Used for pushing subordinates, staff, or team members to work intensively, often with a nuance of demanding effort. Can carry a slightly negative or exploitative tone.

• 上じょう司しは部ぶ下かを駆く使しして、短たん期き間かんでプロジェクトを終おわらせた。

  The boss worked his subordinates hard and finished the project in a short period.