an unsuitable or unhappy marriage.
Origin of mismarriage
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for mismarriage
Historical Examples of mismarriage
Is it not from ignorance of this truth, or wilful denial of this law, that all the miseries of mismarriage come forth?The Mummy and Miss Nitocris