This morning teaching at the Menachem Begin Heritage Center, some of my students (well, Yogi's students - I was substituting) had some coffee or needed to get some fresh air. Truth is, so did I. We all freshened up.
To become freshed in Hebrew is לְהִתְרַעֲנֵן (le-heet-rah-ah-NEHN). For example רֹאשׁ הַשָּׁנָה הוּא זְמַן טוֹב לְהִתְרַעֲנֵן (rosh hah-shah-NAH hoo zmahn tohv le-heet-rah-ah-NEHN) - Rosh Hashanah is a good time to freshen up.