From Wiktionary, the free dictionary
Proto-Indo-European *bʰā- Proto-West Germanic *babō Proto-Indo-European *-kos Proto-Indo-European *-id- Ancient Greek -ῐ́ζω (-ĭ́zō) Proto-Indo-European *-mos Proto-Indo-European *-mós Ancient Greek -μός (-mós) English babyism
From baby + -ism.
babyism (countable and uncountable, plural babyisms)
- The state of being a baby.
- A babyish manner of acting or speaking.