符
フ

token, sign, mark, tally, charm

JLPT2 G7 S11 F1798

As per 付# (set in place) + 竹 bamboo → bamboo tablet/tally split in two to make a pledge, the pieces of which, when set in place, *fit together exactly* → *tally*; *marker* → *paper charm*; *code*.

[Full Kanji Etymology List]