IPA: /kənˈɡruːəsnəs/
KK: /kənˈɡruːəsnəs/
The quality of being in agreement or harmony with something else.
The congruousness of their ideas made the discussion very productive.
Congruousness is formed from "congruere" (meaning to agree or correspond) and the suffix "-ness" (meaning the state or quality of). The word refers to the state of being in agreement or harmony with something.
Think of 'agreeing' ('congruere') and the 'state of' ('-ness') to remember that congruousness means the quality of being in harmony or agreement.