This is the 603rd most frequent German word.
sonst
"Sonst" means "otherwise," "else," or "in other cases."
Otherwise; used as a conjunction to indicate what will happen if the earlier action is not fulfilled.
Komm schnell, sonst verpassen wir den Zug.
Hurry up, otherwise we'll miss the train.
Else; used as an adverb to refer to additional options or inquiries.
Haben Sie sonst noch Fragen?
Do you have any other questions?
Or else; used as an adverb indicating the potential negative consequence of an action.