KANJI GUIDE
A leaf. 言葉, the word for language, is literally leaves of speech.
The only one. 唯一 is unique; 唯我独尊 is standing alone above all.
Sound, including music. 音楽 is music; 発音 is pronunciation.
Lovely, in a composed and graceful way. 美麗 is beautiful; 華麗 is splendid.
The capital, and any big city. 東京都 is the Tokyo Metropolis; 都合 is how your circumstances stand.