Their misalliance resulted in an unhappy marriage.
failed relationship
Frequency:
60
%
The misalliance between them led to a failed relationship.
incompatible partners
Frequency:
50
%
Their misalliance made them incompatible partners.
mismatched couple
Frequency:
45
%
They were a mismatched couple due to their misalliance.
Idiomatic Expressions for misalliance
Phrase: avoid a misalliance
Meaning: to prevent a relationship or partnership that is likely to be unsuccessful or problematic
Usage: The business owner decided to avoid a misalliance by carefully selecting his partners.