How do you express relationships by marriage in one phrase?

I understand that any blood relationship can be expressed either by direct-line terminology (son/daughter/father/mother/grandfather) or by cousin terminology (second cousin once removed). How do you express relationships by marriage with one phrase? There are mother-in-laws and father-in-laws and brother-in-laws and sister-in-laws, but how would you get the general relationship? For example, what is the relationship between my father's mother and my mother's mother?How do you express relationships by marriage in one phrase?
There isn't one.How do you express relationships by marriage in one phrase?
is there one?





i would say they are just the in laws





like my sister and my husbands brother- there is no relationship between them. they're not brother/sister in laws to each other





or my neice %26amp; my husbands nephew, there's nothing for them either
There is no relationship between the two except friendship if they so choose,


Marriage does not bind two family's irrevocable through the generations and their are only certain members it effects
relationship by marriage_mutual understanding_unconditional love binding by un conditional love till death
They are in-laws.
They are inlaws.
daughter/sons father in law