inadvertently is OK
you could also say 'accidentally'
It would be easier if you posted the actual sentence, so that we had some context.
٥ سبتمبر ٢٠١٢
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samad,
The adverb "indeliberately" is listed in the Webster's Unabridged and in the Oxford.
Synonyms:
inadvertently
involuntarily
unintentionally
unpremeditatedly