This is the 429th most frequent Korean word.
사용할
"To use" or "usable."
'사용할' is used to refer to 'will use' (future tense usage) in an action-oriented statement.
저는 이 도구를 사용할 것입니다.
I will use this tool.
'사용할' here indicates 'to use' in a question form, asking about the possibility.
이 앱을 사용할 수 있을까요?
Can I use this app?
'사용할' is embedded in a question phrasing regarding making plans to 'use' something.