If "pounce" means to suddenly attack:
* Withdraw: To move back or away from something.
* Retreat: To move away from a dangerous or unpleasant situation.
* Cower: To shrink back in fear.
* Flee: To run away quickly.
* Yield: To give way to pressure or force.
If "pounce" means to seize an opportunity:
* Miss: To fail to take advantage of an opportunity.
* Ignore: To pay no attention to something.
* Hesitate: To pause or delay because of uncertainty.
* Forgo: To give up or refrain from something.
* Delay: To postpone or put off.
If "pounce" means to jump suddenly:
* Step back: To move away from something.
* Remain still: To stay in one place without moving.
* Glide: To move smoothly and effortlessly.
* Float: To stay on the surface of a liquid.
The best antonym will depend on the specific context in which you are using the word "pounce."