noun-modifying (irregular)
Describes behavior, ideas, or appearance that is immature or childlike in a negative or critical way. Often used for adults acting like children.
I was disgusted by his childish behavior.
Such a childish excuse won't work.
Standard kanji spelling.
Alternative spelling using 子ども, common in materials aimed at children or learners.
Rare spelling using 染みた; the じみた part is more commonly written in kana.
Compound of 子供 (child) + じみた, the past tense of 染みる (to soak into, to be tinged with), meaning 'tinged with childishness'.