摩擦(まさつ)

friction; conflict

擦(す)り傷(きず)

scratch; scrape

擦(す)り切(き)れる

to be worn out; to be rubbed away

擦(す)れ違(ちが)う

to pass each other; to misunderstand

擦(す)り減(へ)る

to wear down; to decrease through friction

擦(す)り寄(よ)る

to draw close; to ingratiate oneself

転(ころ)んで、ひざに擦(す)り傷(きず)ができた。

I fell and got a scrape on my knee.

摩擦(まさつ)で靴底(くつぞこ)が擦(す)り減(へ)った。

The soles of my shoes were worn down by friction.