crack the door

crack the door (open)

and crack the window (open)

to open the door or window a very small amount. I cracked open the door to peek out. Just crack the window a bit to let some air inside.

Name	Pronounced	Usage
Haytham	-	Arabic
Dacre	-	English (Rare)
Olympias	-	Ancient Greek
Ave	AH-ve	Estonian
Matthias	mah-TEE-ahs (German), mə-THIE-əs (English)	Greek, German, Swedish, Norwegian, Danish, French, Dutch, Biblical, Biblical Latin, Biblical Greek
Niviarsiaq	-	Native American, Greenlandic