childish

adj.

1. Of, relating to, or suitable for a child or childhood: a high, childish voice; childish nightmares.
2. 1. Marked by or indicating a lack of maturity; puerile: tired of your childish pranks.
   2. Not complicated; simple.
   3. Affected mentally by old age; senile.

childishly child'ish·ly adv.
childishness child'ish·ness n.

adjective

Of or characteristic of a child, especially in immaturity: babyish, immature, infantile, juvenile, puerile. See youth/age/maturity.

adj

Definition: immature, silly
Antonyms: adult, mature, sensible, serious, wise

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IN BRIEF: adj. - Indicating a lack of maturity.

It's childish to hold a grudge.

Dansk (Danish)
adj. - barnlig, barnagtig

Nederlands (Dutch)
kinderachtig, onvolwassen

Français (French)
adj. - d'enfant, puéril

Deutsch (German)
adj. - kindisch, kindlich

Ελληνική (Greek)
adj. - παιδιάστικος, παιδαριώδης

Italiano (Italian)
infantile, puerile

Português (Portuguese)
adj. - infantil, ingênuo

Русский (Russian)
ребяческий, инфантильный

Español (Spanish)
adj. - infantil, aniñado, pueril

Svenska (Swedish)
adj. - barnslig, enfaldig

中文（简体）(Chinese (Simplified))
天真的, 孩子气的

中文（繁體）(Chinese (Traditional))
adj. - 天真的, 孩子氣的

한국어 (Korean)
adj. - 어린애 같은, 유치한, 어린

日本語 (Japanese)
adj. - 子供じみた, 幼稚な, 大人げない, 子供らしい

العربيه (Arabic)
‏(صفه) طفولي, صبياني‏

עברית (Hebrew)
adj. - ‮ילדותי, טיפשי‬

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