el/la tonto / tonta (adjective, noun)

Frequency star
  1. silly, foolish, dumb
  2. fool, idiot (as a noun)

Seríamos tontos si no aceptáramos.

We would be foolish if we didn't accept.

Las negociaciones se estancaron por culpa de un malentendido tonto.

The negotiations stalled because of a silly misunderstanding.

Me encanta que siempre se ría de mis chistes tontos.

I love that they always laugh at my stupid jokes.