infantile

[ in-fuhn-tahyl, -til ]
/ ˈɪn fənˌtaɪl, -tɪl /

adjective

characteristic of or befitting an infant; babyish; childish: infantile behavior.
of or relating to infants or infancy: infantile diseases.
Physical Geography. youthful (def. 5).

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Origin of infantile

From the Latin word infantīlis, dating back to 1690–1700. See infant, -ile

synonym study for infantile

1. See childish.

OTHER WORDS FROM infantile

in·fan·til·i·ty [in-fuhn-til-i-tee], /ˌɪn fənˈtɪl ɪ ti/, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for infantile

British Dictionary definitions for infantile

infantile
/ (ˈɪnfənˌtaɪl) /

adjective

like a child in action or behaviour; childishly immature; puerile
of, relating to, or characteristic of infants or infancy
in an early stage of development

Derived forms of infantile

infantility (ˌɪnfənˈtɪlɪtɪ), noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medical definitions for infantile

infantile
[ ĭnfən-tīl′, -tĭl ]

adj.

Of or relating to infants or infancy.
Displaying or suggesting a lack of maturity; extremely childish.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.