いi-adjective
painful
kurushii
meaning: is painful
state
feeling
examples
坂を上ったら、息が苦しくなった。
saka o nobottara, iki ga kurushiku natta.
I went up the hill and my breathing got laboured. casual
今年は生活が少し苦しいです。
kotoshi wa seikatsu ga sukoshi kurushii desu.
Money is a little tight this year. neutral