From taqaph; might or (figuratively) positiveness -- authority, power, strength.
see HEBREW taqaph
H8633. toqeph
תֹּ֫קֶף noun masculine power, strength, energy (Aramaic תֹּקֶף תְּקוֺף, ); — ׳ת absolute Esther 9:29; construct Daniel 11:17, the strength of his whole kingdom; suffix תָּקְמּוֺ Esther 10:2 the deeds of his power (+ גְּבוּרָתוֺ, etc.).