What does pactor mean in Latin?

pactor, a noun, means “One who makes a contract or treaty; negotiator.”.

What is the genitive of pactor?

The genitive singular is pactōris. pactor is masculine, third declension.

masculineOne who makes a contract or treaty; negotiator.
En foederum interpretes, societatis pactores, religionis auctores!Here are interpreters of treaties, settlers of the terms of alliances, authorities as to religious obligations!70 BCE, Cicero, In Verrem 5.55

pactor, ōris, m. paciscor,

I. one who makes a contract, a contractor, negotiator: societatis pactores, Cic. Verr. 2, 5, 21, § 55.