When to use to try hard in Korean
Korean: 애쓰다[ ae-sseu-da ]

When to use it
애쓰다 means to make a strong effort to do something, even when it is difficult. You use it when someone is trying hard, being careful, or doing their best. It is often used for everyday actions like studying, speaking, finding something, or helping someone.
Example sentences
저는 매일 일찍 일어나려고 애써요.
I try hard to wake up early every day.
민수는 시험을 위해 열심히 공부하려고 애썼어요.
Minsu tried hard to study for the test.
아이는 울지 않으려고 애써요.
The child tries hard not to cry.
저는 한국어로 말하려고 애써요.
I try hard to speak in Korean.
엄마는 싼 과일을 찾으려고 애썼어요.
Mom tried hard to find cheap fruit.
우리는 여행 중에 길을 찾으려고 애썼어요.
We tried hard to find the way during the trip.