膝盖

• Pinyin: xī gài
• Hanzi breakdown: 膝 = 月(flesh radical) + 桼 (phonetic component — indicating knee area); 盖 = 艹 + 盍 (grass/cover + covered vessel — a lid or cap)

Meaning

Knee; kneecap. The joint connecting the upper and lower leg.

Common in medical, sports, and everyday contexts. Often appears in phrases about kneeling, injuries, or joint health. 膝 is the formal character; 膝盖 is the colloquial compound used in everyday speech.

Examples

1. 他在篮球训练中扭伤了膝盖，不得不暂停训练接受治疗。 He twisted his knee during basketball practice and had to pause training for treatment.
2. 长时间跪坐会对膝盖关节造成不必要的压力，建议每隔一段时间起身活动。 Sitting on your knees for a long time puts unnecessary stress on your knee joints, so it’s best to stand up and move around from time to time.
3. 运动员在高强度训练后常常进行冰敷，以减轻膝盖周围的肿胀和疼痛。 After high-intensity training, athletes often use ice packs to reduce swelling and pain around the knee.

Usage Guide

Context: medical, sports, everyday, anatomy

Tone: neutral

Do Say

• 医生检查后说，这位长期重体力劳动者的膝盖半月板已明显磨损，若不及时保守治疗，可能要手术。(After the examination, the doctor said that this long-time heavy laborer’s knee meniscus was already badly worn, and if conservative treatment was not started in time, surgery might be needed.)
• 研究表明，跑步时前脚掌着地比脚跟着地更能减轻膝盖冲击，所以教练常建议系统矫正跑姿。(Studies show that landing on the forefoot while running reduces impact on the knees better than heel striking, so coaches often recommend systematic gait correction.)

Don't Say

• 膝盖 in very formal medical writing where 膝关节 (knee joint) is the precise anatomical term — while 膝盖 is universally understood, formal clinical reports and anatomical descriptions typically use 膝关节 to refer specifically to the joint structure

Origin & History

膝 = 月(肉) + 桼 (body flesh radical + lacquer tree — knee joint area of the leg); 盖 = 艹 + 盍 (cover — lid/cap, here meaning the kneecap covering the joint)

Cultural Context

Generation: All ages

Social background: Universal