expression, suru verb (irregular)
try to do; attempt to do
Expresses volitional attempt or effort to perform an action. Often used when the outcome is uncertain or when describing an action that is about to happen.
彼は新しい言語を学ぼうとしている。
He is trying to learn a new language.
電車に乗ろうとしたが、
I tried to get on the train, but the doors closed.