childish
adjective
child·ish ˈchī(-ə)l-dish
1
2
a
: marked by or suggestive of immaturity and lack of poise
a childish prank
behavior that was petty and childish
b
: lacking complexity : simple
It's a childish device, but it works.
c
: exhibiting a decline of cognitive abilities (such as memory) associated with old age
He did not like to lose his temper with his parents. … They were both getting childish and needed care and yet they resented any loss of authority.—
Pearl Buck
childishly adverb
behaving childishly
The concept is almost childishly simple. —
Business Week
childishness noun
… the childishness of the script overshadows a marvelous performance by Dolly Parton … —
People Weekly
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Merriam-Webster unabridged



