Antonyms of adj childly

1 sense of childly

Sense 1
childlike, childly -- (befitting a young child; "childlike charm")

INDIRECT (VIA young) -> old -- ((used especially of persons) having lived for a relatively long time or attained a specific age; "his mother is very old"; "a ripe old age"; "how old are you?")

Similarity of adj childly

1 sense of childly

Sense 1
childlike, childly -- (befitting a young child; "childlike charm")
       => young (vs. old), immature -- ((used of living things especially persons) in an early period of life or development or growth; "young people")