IPA: /ˈɔːkwərdər/
KK: /ˈɔkwərdər/
More uncomfortable or clumsy than something else.
He felt even awkwarder when he realized he had forgotten her name.
Awkwarder is formed from "awkward" (from Old Norse *afkvart*, meaning turned away or off) and "-er" (meaning a person who). The word "awkwarder" refers to a person who is more awkward or clumsy than others.
Think of someone who is 'turned away' ('awkward') from grace or ease, and the '-er' indicates that this person is more so than others.