IPA: /ɪˈnɑːrɡjʊəbli/
KK: /ɪnˈɑrɡjʊəbli/
In a way that cannot be argued against; certainly or definitely.
Inarguably, she is the best player on the team.
Inarguably → It is formed from "in-" (meaning not), "arguere" (meaning to make clear or to argue), and "-ably" (meaning in a manner). The word means in a manner that cannot be argued against or disputed.
Think of 'not' ('in-') being combined with 'arguing' ('arguere') — this helps you remember that inarguably means something that cannot be disputed.