infantilely

From infantile +‎ -ly.

• IPA^(key): /ˈɪn.fən.taɪl.li/

infantilely (comparative more infantilely, superlative most infantilely)

1. In an infantile manner; childishly.

• Oxford English Dictionary, 1884–1928, and First Supplement, 1933.
• “infantilely”, in Merriam-Webster Online Dictionary, Springfield, Mass.: Merriam-Webster, 1996–present.