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infantine

American  
[in-fuhn-tahyn, -tin] / ˈɪn fənˌtaɪn, -tɪn /

adjective

  1. infantile.

Etymology

Origin of infantine

1595–1605; infant + -ine 1, modeled on Middle French enfantin

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.