From raga'; rest -- refreshing.
see HEBREW raga'
H4774. margeah
מִרְגֵּעָה noun feminine rest, repose (poetry), Isaiah 28:12 הַמּ זאֹת אָמַר ׳אֲשֶׁר שְׁמוֺעַ אָבוּא וְלאֹ ("" חַמְּנוּחָת).