符 (fú) is a noun that primarily refers to a mark, symbol, or sign that represents something else — like a musical note (音符), a mathematical symbol, or a tally mark. It also refers to the supernatural talismans used in Daoist rituals (符咒). As a surname it's also common. The verb sense 'to accord with' belongs to a separate part of speech (fú, as in 符合); for this noun entry, focus on the physical or abstract marking.