This is the 91st most frequent Swedish word.
ingen
"Ingen" means "no one" or "nobody," and can also mean "no" or "none" when referring to objects.
Here, 'ingen' is functioning as an indefinite pronoun meaning 'no one' or 'nobody'.
Ingen kommer att komma till mötet.
No one will come to the meeting.
In this sentence, 'ingen' acts as a negation emphasizing the absence of 'aning' (an idea).
Jag har ingen aning om var nycklarna är.
I have no idea where the keys are.
Here, 'ingen' is used to deny the existence of 'anledning' (a reason).