中堅 ちゅうけん
- backbone; key figure; mainstay; nucleus
- medium-level; mid-level; middle-ranking; midsize
- crack troops; main body (of troops); select troops
- center field; center fielder; centre field; centre fielder
- athlete competing in the middle-number match in a team competition, i.e. second in 3-on-3, third in 5-on-5 (kendo, judo, etc.)