Condescend
Definition 1 of 2
Pro Tip 1/3
Tone of Superiority
Using 'condescend' can imply that someone feels superior and is acting in a haughty way. His tone was condescending, as if he was the only expert in the room.
Pro Tip 2/3
Implied Insult
Being condescending often unintentionally insults the other person, suggesting they're less capable or worthy. When he condescended to explain the basics, I felt he underestimated my knowledge.
Pro Tip 3/3
Cultural Sensitivity
Be aware that seeming condescending can cause offense, cultural norms for respect can vary greatly. In her attempt to be friendly, her condescending attitude offended the locals.