9 Grammatical Pitfalls


[th air-fawr, -fohr] /ˈðɛərˌfɔr, -ˌfoʊr/
in consequence of that; as a result; consequently:
I think; therefore I am.
Origin of therefore
1125-75; Middle English ther(e)fore, variant of therfor therefor
Can be confused
therefor, therefore (see synonym study at the current entry)
hence, whence. Therefore, wherefore, accordingly, consequently, so, then all introduce a statement resulting from, or caused by, what immediately precedes. Therefore (for this or that reason) and wherefore (for which reason) imply exactness of reasoning; they are especially used in logic, law, mathematics, etc., and in a formal style of speaking or writing. Accordingly (in conformity with the preceding) and consequently (as a result, or sequence, or effect of the preceding), although also somewhat formal, occur mainly in less technical contexts. So (because the preceding is true or this being the case) and then (since the preceding is true) are informal or conversational in tone. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for therefore
  • The result of his trial, therefore, could hardly have been other than a foregone conclusion.
  • therefore, the pattern of oceanic winds should matter a lot to their survival, especially during breeding season.
  • Red oak is known to be a more porous wood and therefore more likely to leak.
  • Marine biologists say that giant squid therefore can act as an indicator of deep-sea pollution.
  • therefore they will typically only have a bag or two to last them the entire night.
  • therefore, vulnerable people should make specific changes in their diet.
  • The latter cannot, therefore, depend upon the former.
  • Environmentalists, therefore, have missed a huge opportunity.
  • The big difference is in using electricity to control the speed of the piston, and therefore control the timing and efficiency.
  • Because of the distance, the smoke is cool when it hits the food and therefore doesn't cook it.
British Dictionary definitions for therefore


sentence connector
thus; hence: used to mark an inference on the speaker's part: those people have their umbrellas up: therefore, it must be raining
consequently; as a result: they heard the warning on the radio and therefore took another route
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for therefore

Old English þærfore; from there + fore, Old English and Middle English collateral form of for. Since c.1800, therefor has been used in sense of "for that, by reason of that;" and therefore in sense of "in consequence of that."

Online Etymology Dictionary, © 2010 Douglas Harper
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