KANJI GUIDE
The 陽 of 陰陽 — the bright half, the warm half, the side facing the sun. 太陽 is the sun itself.
Summer. 真夏 is the height of it.
Clear and cheerful, of a voice or a person. 明朗 is bright and open; 朗読 is reading aloud.
The sky, and heaven with it. 天国 is paradise; 天気 is the weather.