Etymology

adultly

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Today it means: In an adult manner; not childishly. Full definition →

English adult ← French adulte ← Latin adultu
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The story

  1. Latinadolēscō
  2. Latinadultu
  3. Frenchadulte
  4. Englishadult
  5. English todayadultly

From adult + -ly.

Etymology from Wiktionary, CC BY-SA 4.0.