verb

1. To convey some subject matter in simple terms, avoiding technical or academic language, especially in a way that is considered condescending.

   “The public won't understand this concept. We need to dumb down our explanation of it.”

2. To become simpler in expression or content; to become unacceptably simplistic.

   “Television has really dumbed down over the past ten years.”

Synonyms: downplay, layman's terms, oversimplify, simplify, trivialise, vulgarise, vulgarize