• 労働ろうどう — labor / work
• 過労かろう — overwork
• 労力ろうりょく — effort / exertion
• 疲労ひろう — fatigue
• 労使ろうし — labor and management
• 労苦ろうく — hardship / toil

労 combines ⺶ (variant of 艹) with 力 (power), symbolizing exertion and fatigue. It represents physical work, but also appreciation and sympathy for effort — as seen in expressions like “ご苦労様”.

彼かれは 毎日まいにち労働ろうどうしています。
He works hard every day.

過労かろうで 倒たおれた。
He collapsed from overwork.