IPA: /əˈkjuːzɪŋli/
KK: /əˈkyuːzɪŋli/
In a way that suggests someone has done something wrong or is to blame.
She looked at him accusingly after he broke the vase.
Accusingly → It is formed from "accuse" (from Latin "accusare", meaning to call to account or to blame) and the suffix "-ingly" (indicating a manner of doing something). The word "accusingly" means in a manner that expresses blame or accusation.
Think of someone expressing blame or calling someone to account when they act 'accusingly' — that's why it means to do something in a blaming manner.