轮椅
lúnyǐ · HSK 4
wheelchair
♿ 轮椅 = 轮 (wheel) + 椅 (chair)
Literal compound: 轮 lún means wheel (same 轮 as in 轮子) and 椅 yǐ means chair (as in 椅子). Stack them and you get the everyday word for wheelchair.
轮 — car radical 车 + 仑 (phonetic)
轮 is a semantic-phonetic compound. The left side 车 (chē, 'cart/vehicle') gives the meaning, since 轮 originally referred to a wheel. The right side 仑 supplies the sound 'lún'. From 'wheel' it extended to related senses like 'rotate', 'take turns', and 'round'.