牘
トク, かきもの, ふだ
letter
JLPT0 G13 S0 F5000
As per ?# as described in 續 (pass along) + 片 (long piece of wood split down the middle) → written instruments for passing along knowledge → *inscribed tablet*; *writings*; *letter*. For the transmission of knowledge, compare 讀.
[Full Kanji Etymology List]