verb (accompanies, accompanying, accompanied)[with object]
late Middle English: from Old French accompagner, from a- (from Latin ad 'to, at') + compagne, from Old French compaignon 'companion'. The spelling change was due to association with company
Spell accompany with a double c and one m.
If a word ends in a consonant plus -y (as in defy), change the -y to an -i before adding any ending (unless the ending already begins with an -i): (accompanies, accompanying, accompanied).