Or (feminine) miph.alah {mif-aw-law'}; from pa'al; a performance -- work.
see HEBREW pa'al
H4659. miph
'al [מִפְעָל] noun [masculine] work, thing made (by ׳י); — plural suffix מִפְעָלָיו Proverbs 8:22.
[מִפְעָלָה] noun [feminine] deed (of ׳י); — plural construct י ׳מִפְעֲלוֺת Psalm 46:9, ׳מ אֱלֹהִים 66:5.