I think this kanji has an interesting shape! しめ (shime) has quite a few meanings like 〆切 (shimekiri, meaning deadline), 活〆 (ikijime, which is the process used after catching a fish), 昆布〆 (kobujime, a local cuisine from Toyama-ken (富山県)), or 羽交い〆 (hagaijime, a restraint technique).
It can be substituted for other kanji with a different meaning for each situation.
It reminds me of the “alfa” greek letter. What about you?