Puerile

Puerile

<pur-ree-ill>

immature; trivial; foolish;

being childish and having bad judgment.

The puerile student frustrated the teacher and distracted the class.

Memory trick:
puerile reminds of pure rile
we are riled when someone acts silly

At work:
We need to be less puerile and get serious about this project.

(c) 2015 E. Carruthers