Childish
From BiblePortal Wikipedia
King James Dictionary [1]
Childish, a.
1. Belonging to a child trifling puerile.
When I became a man, I put away childish things. 1 Corinthians 13 .
2. Pertaining to a child as childish yeas or age childish sports. 3. Pertaining to children ignorant silly weak as childish fear.
Webster's Dictionary [2]
(1): (a.) Of, pertaining to, befitting, or resembling, a child.
(2): (a.) Puerile; trifling; weak.