I was going through Tae Kim’s practice section for state of being (だ, じゃない, etc) and noticed that he had 先 but had marked it as ahead/future (he appears to use it for past/previous too). This confused me since I’ve only learned it as せん or previous on WK up to now. Looking at https://jisho.org/search/先%20%23kanji it does appear that both are correct meanings.
Is this something that requires sentence context or will words that use it for past like context generally have different attached kanji/okurigana than those with a future context? Wondering how likely this is to confuse me once I get to those words.