A union or partnership that is poorly suited or inappropriate.

असंगति

English Usage: Their marriage was considered a misalliance due to their differing social statuses.

Hindi Usage: उनका विवाह असंगति माना गया क्योंकि उनकी सामाजिक स्थिति भिन्न थी।

To incorrectly ally or associate with someone or something.

गलत संधि करना

English Usage: He misallied himself with a group known for its extreme views.

Hindi Usage: उसने गलत संधि करके एक समूह के साथ जुड़ गया जो अपनी चरम विचारों के लिए जाना जाता था।