therefore vs. therefor

The word therefore is sometimes mistakenly spelled therefor because of the silent E that appears at the end, but the two are unique words with different meanings.
Therefore is what most writers mean to use in modern English. It is an adverb and conjunction meaning “thus; hence; consequently; as a result.” For example:
  • “It is raining too heavily to cross the bridge safely; we must therefore find an alternative route.”
  • “Literature, therefore, is a means of empathizing with those for whom we would have no natural affinity in real life.”
Therefor, without the silent E, is generally considered archaic in modern English. It is also an adverb, but it means “for or in exchange for this, that, or it.” For example:
  • “I’ve enclosed a list of required goods and the payment therefor.”
Aside from certain legal contexts, you’re most likely never going to use therefor; therefore, just remember that you probably need a silent E at the end.
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