immaturity

"The condition for getting a raise at work is meeting your quarterly targets. "

"Her youth and beauty attracted him to her."

"It was evident she was angry, after she slammed the door."

"The zookeeper carefully separated the mature gorillas from the immature in the enclosure to prevent conflict. "

"The being in the classroom was quiet today. "

"I had a very long wait at the airport security check."

"Often used to imply membership of a large class."

"He fully met his responsibilities."

"Go easy on him: he is but a child."

"Her inability to speak French made it difficult to understand the instructions. "

"Children grow quickly."

"The storm during all night. "