Hebrew and Greek Strong's Dictionary with all the definitions plus combined with every place that word is used in the definitions.
Complete index of every word used in both the Hebrew and Greek Strong's Dictionary in English Word order.
Hebrew and Greek Expanded Dictionary
usurp 0831 - authenteo {ow-then-teh'-o}; from a compound of 0846 and an obsolete hentes (a worker); to act of oneself, i.e. (figuratively) dominate: -- {usurp} authority over.