精神年齢 せいしんねんれい Meanings Noun mental age Kanji 精 spirit. Read as セイ. 神 god. Read as シン. 年 year. Read as ネン. 齢 age. Read as レイ. Example sentences お前精神年齢低すぎだろ。Your mental age is too low. Jinuma: Japanese Dictionary · Word lists