Learn how to say Inadvertently correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word inadvertent:
not resulting from or achieved through deliberate planning:
an inadvertent administrative error occurred that resulted in an overpayment
he was pardoned for inadvertent manslaughter
mid 17th century (earlier (late Middle English) as inadvertence): from in-1 ‘not’ + Latin advertent- ‘turning the mind to’ (from the verb advertere)
Remember that inadvertent ends with -ent.