This is the 9472nd most frequent Japanese word.
符
"符" means "token," "sign," or "mark," and can also refer to "talisman" or "seal" in specific contexts.
In this sentence, '符' is used in the word '音符' (onpu), meaning 'musical notes'. It denotes symbolic representations used for music notation.
音符を読みにくいと思います。
I find musical notes hard to read.
Here, '符' appears in the term '符号' (fugou), which stands for 'symbols', often mathematical or coding notation.
この文章を読むには適切な符号が必要です。
To read this document, appropriate symbols are necessary.
In this usage, '符' indicates a talisman or a kind of charm, relating to traditional concepts in culture and religion.