0 New HSK word(s):

1 Old HSK word(s): C VS 幼稚 * you4zhi4 jung, klein, kindisch, naiv

孩子气 [hai2 zi5 qi4]

Naivität (S)kindisch (Adj)burschikos, jungenhaft
幼小 [you4 xiao3]

kindischunreif
稚 [zhi4]

jung, kindisch, unreif