Despite their adult positions, the committee members often engaged in puerilities that undermined their credibility.

Her puerileness in refusing to apologize surprised everyone at the meeting.

She puerilely dismissed his thoughtful critique, laughing as if it were merely a childish prank.

The critic argued that the novelist's puerilization of complex themes weakened the impact of the story.

His constant puerility during meetings made it difficult for colleagues to take him seriously.

His puerile refusal to apologize only made the situation worse.

The clinician recorded clear signs of puerilism during the assessment, noting the patient's insistence on being cared for like a child.

At the meeting, his puerilisms embarrassed everyone and undermined his credibility.