verb/kaˈsaɾ/
to marry, wed someone to (unite two others in wedlock); to marry off; to match (up), fit (together); to get married, marry (each other, one another); to wed, marry, get married
“Este tercero les ayudará a casar las necesidades con los recursos.” — This third party will help them match needs with resources.
Synonyms: desposar
Probably from casa + -ar (lit. "to become a member of the house"). Compare also Italian accasare, Romanian căsători.