"발가락이 아파서 저는 발꿈치로 걸어요."
Translation:My toes hurt so I walk on my heels.
• Meaning (uncertain):
Does 꿈치 describe bending/a bend (굽힘) of some sort?
뒤꿈치 - back bending/in- bend
앞꿈치 - front bending/out- bend (Is this word accepted?)
뒤꿈치 - in-bend/heel (covers also socks and shoes)
발(뒤)꿈치 - in-bend of the foot; hence, foot heel.
손(뒤)꿈치 - in-bend of the hand; hence, hand heel. (cf. Martial Arts 'palm strike')
팔(뒤)꿈치 - in-bend of the arm; hence, elbow
Knee is more of "앞꿈치", an out-bend. However, no "다리앞꿈치" exists.
Instead, it seems Koreans see knees as part of the upper leg, 무릎.
(*Hence the interpretation of 무릎 as both knee and lap.)