KANJI GUIDE
Read sei or se.
A leaf. 言葉, the word for language, is literally leaves of speech.
Long life, and the celebration of it. The character on wedding envelopes and New Year food.
Tea, and the whole world around it. 茶道 is the way of tea.
This is the character the katakana ン grew out of. It stands for a sound, not a word — the old form of 無, nothing.