불가결해요 · 불가결했어요 · 불가결한 (+noun)
indispensable, essential
Example
물은 생명에 불가결한 요소예요.
Water is an indispensable element for life.
Word parts
불 not+가 can+결 lack
Literally 'cannot be lacking'.
Good to know
Usually seen in 필요불가결하다 'absolutely essential'.
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불가결해요 · 불가결했어요 · 불가결한 (+noun)
indispensable, essential
Example
물은 생명에 불가결한 요소예요.
Water is an indispensable element for life.
Word parts
Literally 'cannot be lacking'.
Good to know
Usually seen in 필요불가결하다 'absolutely essential'.