advise

Adviser or advisor? It doesn't matter what your computer's spellcheck tells you, adviser and advisor are both correct. Although there is enough overlap between these two words that they are generally considered simply to be different ways to spell the same word, there are some cases in which one tends to be used more often than the other. Some people feel that advisor is more formal, and it tends to be found more often when applied to official positions, such as an advisor to a president. When referring to someone who is serving in a military role, especially when using the term as a euphemism (as when claiming that troops are actually military advisers), then adviser is somewhat more common.

Advise was borrowed into Middle English in the 14th century from Anglo-French aviser, itself from avis, meaning "opinion." That avis is not to be confused with the Latin word avis, meaning "bird" (an ancestor of such English words as avian and aviation). Instead, it results from the Old French phrase ce m'est a vis ("that appears to me"), a partial translation of Latin mihi visum est, "it seemed so to me" or "I decided." We advise you to remember that advise is spelled with an s, whereas the related noun advice includes a stealthy c.