From uwph in the sense of covering with shade (compare muw'aph); darkness -- dimness.
see HEBREW uwph
see HEBREW muw'aph
H4588. mauph
[מָעוּף] noun [masculine] id.; — construct צוּקָה מְעוּף Isaiah 8:22 ("" הֲשֵׁכָה); CheHpt. reads מוּעַף.
תְּעֻפָה
noun feminine id.; — so read probably for תָּעֻ֫פָה Job 11:17 (opposed to כֹּקֶר).