What is this? Maybe a word IS-t2?
If so, we'd find שלב in the dictionary. And we do: verb שָׁלַב means in Qal to connect, to link, tie.
And the same verb, dictionaries tell, means to combine in the Pi'el: שִׁלֵּב
So, as we have the Pu'al Past, third person plural common, we get: they (males, females or both) combined.