puerile: [17] Latin puer denoted ‘child’, or more specifically ‘boy’ (like Greek pais ‘child’, source of English paediatric, pedagogue, etc, it came ultimately from a base which signified ‘smallness’, and also gave English pusillanimous). The derived adjective puerīlis ‘childlike’ began to acquire its negative connotations in Latin, and brought them with it into English. The related puerperal ‘of childbirth’ [18] comes from a Latin compound formed from puer and parere ‘give birth’ (source of English parent). => pusillanimous
puerile (adj.)
1660s, "youthful, boyish," a back-formation from puerility, or else from French puéril (15c.), from Latin puerilis "boyish; childish," from puer "boy, child" (see puerility). Disparaging sense, "juvenile, immature," is from 1680s.
例文
1. Concert organisers branded the group 's actions as puerile .
コンサートの主催者は、このバンドの行為が愚かで幼稚であることを指している。
2.The story is simple，even puerile .
物語は簡単で、幼稚なものもあります。
3.The belief in it issues from the puerile egos of inferior men.
という信仰は、下人たちの幼稚な利己的な意識から生まれた。
4.He was more interested in states of mind than in " puerile superstitions，Gothic castles，and chimeras."
彼は気持ちを描くのが好きで、「退屈な迷信、尖ったアーチ式の砦と妖魔鬼」を描きたくない。A puerile tear dimmed my eye while I looked a tear of disappointment and impatience.