noun
precious letter; love letter
Poetic term for a treasured letter, especially a love letter. Used in classical or literary contexts.
玉梓をしたためて、遠くの恋人に思いを伝えた。
I wrote a precious letter to convey my feelings to my distant lover.
From 玉 (tama, 'jewel, precious') + 梓 (azusa, 'catalpa wood', used for printing blocks or letter boards). The exact historical derivation is uncertain, but the combination evokes a precious written message.