중

中

사용중 <使用中>

Meaning: The center, the middle, medium, China

中 in this context means medium (size)

• 중심 <中心> - the center
• 중소기업 <中小企業> - small and medium enterprises
• 중순 <中旬> - the middle ten days of a month
• 중학교 <中學校> - middle school
• 중간고사 <中間考査> - A midterm exam
• 중동 <中東> - the Middle East
• 연중무휴 <年中無休> - open Throughout The Year
• 집중 <集中> - concentration
• 집중력 <集中力> - one´s ability to concentration
• 중국 <中國> - China
• 한중 <韓中> - Korea and China
• 중앙 <中央> - the center, the middle

重

Meaning: Heavy, weighty, double

• 중상 <重傷> - a heavy wound, serious injury
• 소중(하다) <所重> - to be precious
• 중요(하다) <重要> - to be important, to be significant

衆

Meaning: multitude, crowd, masses, public

• 대중교통 <大衆交通> - public transportation
• 대중 <大衆> - The general public, the masses

仲

Meaning: middle brother, go between, mediator