serious
The German word 'ernst' is an adjective that is used to describe something as serious or important. It can be used to describe a situation, a person's attitude, or a piece of work. For example, you might say 'Das ist eine ernste Situation' (This is a serious situation) or 'Er ist ein ernster Mensch' (He is a serious person).
Don't take life so seriously.
This German phrase is an idiom implying not to be so serious about life, to be more relaxed and take things in stride.
Being serious is important.
This sentence suggests the importance of being serious and can refer to various contexts, like work, study, or any situation that requires seriousness.
That is a serious problem.
This sentence is typically used to define a situation that is dangerous, difficult or disturbing, hence, considered serious and needs urgent attention or action.