What are words containing the root word sid Meaning to sit?

You're thinking of the Latin root word "sed-" which means "to sit." Here are some words containing that root:

* Sedentary: Characterized by or requiring a lot of sitting.

* Sessile: Attached or fixed to one place and not moving.

* Sediment: Solid matter that settles to the bottom of a liquid.

* Sede: The official seat or residence of a bishop or other high-ranking church official.

* President: The head of a state, company, or other organization. (From the Latin *prae* meaning "before" and *sedere* meaning "to sit.")

* Residence: A place where someone lives.

* Assiduous: Showing great care and perseverance. (From the Latin *assidere* meaning "to sit beside").

Let me know if you'd like more examples!