[Latin puerīlis, from puer, child, boy; see pau-1 in Indo-European roots.] pu'er·ile·ly adv., pu'er·il'i·ty (-ĭl'ĭ-tē), pu'er·ile·ness (-əl-nĭs, -īl-) n.
Main Entry: pu·er·ile Pronunciation: 'pyu(-&)r-&l, -"Il Function: adjective 1: marked by or suggesting childishness andimmaturity 2: being respiration that is like that of a child in being louder than normal <puerile breathing>