General Antonyms:
* Remain still: This is the most basic antonym, implying a complete lack of movement.
* Be silent: This emphasizes the absence of any communication, including gestures.
* Be motionless: Similar to "remain still" but with a stronger emphasis on stillness.
Contextual Antonyms:
* Speak clearly: If "gesticulate" is used to imply a lack of clarity in communication, this antonym suggests using words effectively.
* Write: If "gesticulate" is used in a situation where communication is primarily non-verbal, "write" suggests using a more formal method.
* Remain calm: If "gesticulate" is used to describe someone expressing excitement or anger, this antonym emphasizes composure.
The best antonym for "gesticulate" will depend on the specific context of its use.