Lower your voice.
He lowered the volume of his voice. He began to speak in a calm manner.
(Modern Hebrew)
Translation
Expression (Hebrew)
הִנְמִיךְ אֶת הַטּוֹן
Definition (Hebrew)
הֵרִיד אֶת עָצְמַת קוֹלוֹ. הֵחֵל לְדַבֵּר בְּאֹפֶן רָגוּעַ.
(הָעִבְרִית הַחֲדָשָׁה)