The term "more childing" implies an increase in childish behaviour. Antonyms for this phrase would be words that indicate maturity, responsibility and adulthood. Some potential antonyms include "mature", "adult", "responsible", "grown-up", "serious", "sensible", "wise" and "practical". These words suggest a move away from naive, impulsive or frivolous behaviour towards a more composed, thoughtful and measured approach. While childlike qualities can be endearing in some circumstances, it's important to cultivate a sense of maturity and responsibility as we grow and develop. Using antonyms for "more childing" can help us identify areas where we need to focus our efforts and embrace a more mature outlook on life.