| grün (umgangssprachlich) Âunerfahren Âunqualifiziert Âunreif Âunwissend |
| infantil Âkindisch Âkindlich Âpueril (fachsprachlich) Âunreif |
| Immaturely (adv.) In an immature manner. |
| immaturely jejunely | in an immature manner, his teenage son still behaves very immaturely |