IPA: /ˈkrʌʃɪŋli/
KK: /ˈkrʌʃɪŋli/
In a way that is very overwhelming or disheartening, often causing a sense of defeat or discouragement.
The team's crushingly defeat left them feeling hopeless about the season.
Crushingly → It is formed from "crush" (from Old French *crushier*, meaning to press or squeeze) and "-ingly" (a suffix used to form adverbs indicating manner). The word "crushingly" means in a manner that presses down heavily or overwhelmingly.
Think of the action of 'pressing down' ('crush') and how it can be done 'in a manner' ('-ingly') that feels overwhelming.