Accidentally adv. : In an accidental manner; unexpectedly; by chance; unintentionally; casually; fortuitously; not essentially.

Example:
I Accidentally deleted my joomla files from server? How to install it and have it as it was?

Taxonomy
Dictionary, Synonyms, accident, Music, adjective, tl, nonessential, incidental, subsidiary, unintentionally, accidental meeting, alteration, ness, unforeseen, contingent, adventitious, Houghton Mifflin Company, free online English dictionary.

Defination from the web:
Accidentally - Definition of Accidentally at Dictionary.com a free online dictionary with pronunciation, synonyms, and translation of Accidentally. ... Search another word or see accidentally on Thesaurus | Reference. Facebook Twitter Follow us: ...