i Register
In some senses, sac is marked as informal, UK, historical, US. Watch for register when choosing this word.
noun
A bag or pouch inside a plant or animal that typically contains a fluid.
verb
To sacrifice.
Kasparov sacked his queen early on in the game to gain a positional advantage against Kramnik.
I kept saccing monsters at the altar until I was rewarded with a new weapon.
noun
A sacrifice.
Kasparov's queen sac early in the game gained him a positional advantage against Kramnik.