1. past tense of speak in a severe, strict, or harsh manner; to address someone with disapproval or authority
The teacher spoke sternly to the students about their behavior.
A professora falou severamente com os alunos sobre seu comportamento.
2. to communicate with a firm tone that conveys displeasure or seriousness
He spoke sternly about the importance of following the rules.
Ele falou severamente sobre a importância de seguir as regras.