He persuaded him.
He silenced him. He interrupted his words and told him to be silent (hiss from the Hebrew word hass, to be quiet).
("And Caleb the son of Jephunneh spoke to the people against Moses, and said, "Let us go up and possess it, for it is too much for us to possess" - in the wilderness 13:33, Caleb the son of Jephunneh spoke to the children of Israel who were afraid of the words of the spies)
Translation
Expression (Hebrew)
הִסָּה אוֹתוֹ
Definition (Hebrew)
הִשְׁתִּיק אוֹתוֹ. קֶטַע אֶת דְּבָרָיו אָמַר לוֹ לִשְׁתֹּק (הִסָּה מִלְּשׁוֹן הָס, שֶׁקֶט).
("וַיַּהַס כָּלֵב אֶת הָעָם אֶל מֹשֶׁה וַיֹּאמֶר עָלֹה נַעֲלֶה וְיָרַשְׁנוּ אֹתָהּ כִּי יָכוֹל נוּכַל לָהּ"- בַּמִּדְבָּר יג ל, כֶּלֶב בֶּן יְפֻנֶּה לִבְנִי יִשְׂרָאֵל שֶׁנִּבְהֲלוּ מִדְבָּרִי הַמְּרַגְּלִים)