Impatience
noun
Remember 焦る, which means "to be in a hurry" or "to be impatient"? This is the noun version, which is impatience.
あせり
The reading comes from 焦る.
会議に行かなくちゃいけなかったのに、脚がやばいくらいつって全然動けなかったので、焦りを感じましたよ。
I had a terrible cramp in my leg and I couldn’t move it at all even though I had to go to a meeting, so I felt really impatient.