ajar

"The door was left ajar, allowing a cool breeze to enter the room."

"She noticed the window was ajar and quickly closed it to keep out the insects."

"He called out to his friend through the ajar door, hoping to get a response."

"Please don't ajar the window too wide; we want to keep the room comfortable."

"She decided to ajar the door just enough to hear the conversation inside."

"He ajar the lid of the box to peek inside without fully opening it."