Gesticulate (verb)

Make gestures, especially dramatic or expressive ones, while speaking.

Origin:

From latin gesticulatus, past participle of gesticulare, from gestus "a gesture".

Examples:

1. The speaker gesticulated wildly as he delivered his impassioned speech.
2. The actor gesticulated with his hands to emphasize his points.
3. The teacher gesticulated to help explain the concept to her students.
4. He gesticulated to draw attention to the problem.
5. She gesticulated to show her disagreement with what was said.