infantile

At one point, Valle offered an apology to anybody who had been “hurt, shocked or offended by my infantile actions.”

It was sweet and funny and self-deprecating, nothing like the infantile behavior she had just displayed.

It's how we project our own catastrophe of infantile adulthood.

He led her by the hand, and confided to her infantile spirit all his thoughts, his illusions, his day-dreams.

The Scherzo is neither good nor bad; the trio is so innocent that it would be almost too infantile for a Sniegourotchka.

He listened and heard soft breathing that stopped just short of being an infantile snore.

She was apparently about six years of age, and the picture of infantile innocence and loveliness.

In respect of one symptom or several, many individuals may remain throughout life in an infantile condition.