From BiblePortal Wikipedia

Vine's Expository Dictionary of NT Words [1]

A — 1: Ἐφίστημι (Strong'S #2186 — Verb — ephistemi — ef-is'-tay-mee )

lit., "to stand over" (epi, "over," histemi, "to stand"), signifies "to assault;" said in  Acts 17:5 , of those who attacked the house of Jason. For its usual meanings see COME (in, to, upon), HAND (at), Instant , Present , Stand.

B — 1: Ὁρμή (Strong'S #3730 — Noun Feminine — horme — hor-may' )

rendered "assault" in  Acts 14:5 , AV; RV, "onset," corresponds to hormao, "to rush." See Impulse , Onset.

King James Dictionary [2]

ASSAULT', n. L. assulto, of ad and salto, to leap, formed on salio, or its root. See Assail. We have the same root in insult and result.

1. An attack or violent onset, whether by an individual, a company, or an army. An assault by private persons may be made with or without weapons. As assault by an army is a violent hostile attack and when made upon a fort or fortified place is called a storm, as opposed to sap or siege. 2. An attack by hostile words or measures as, an assault upon the prerogatives of a prince, or upon a constitution of government. 3. In Law, an unlawful setting upon one's person an attempt or offer to beat another, without touching his person as by lifting the fist or a cane, in a threatening manner. If the blow aimed takes effect, it is a battery.


1. To attack or fall upon by violence, or with a hostile intention as, to assault a man, a house or town. 2. To invade or fall on with force as, the cry of war assaults our ears. 3. To attack by words, arguments or unfriendly measures, with a view to shake, impair or overthrow as, to assault a character, the laws or the administration.

Webster's Dictionary [3]

(1): (n.) A violent onset or attack with physical means, as blows, weapons, etc.; an onslaught; the rush or charge of an attacking force; onset; as, to make assault upon a man, a house, or a town.

(2): (n.) To make an assault upon, as by a sudden rush of armed men; to attack with unlawful or insulting physical violence or menaces.

(3): (n.) A violent onset or attack with moral weapons, as words, arguments, appeals, and the like; as, to make an assault on the prerogatives of a prince, or on the constitution of a government.

(4): (n.) An apparently violent attempt, or willful offer with force or violence, to do hurt to another; an attempt or offer to beat another, accompanied by a degree of violence, but without touching his person, as by lifting the fist, or a cane, in a threatening manner, or by striking at him, and missing him. If the blow aimed takes effect, it is a battery.

(5): (n.) To attack with moral means, or with a view of producing moral effects; to attack by words, arguments, or unfriendly measures; to assail; as, to assault a reputation or an administration.

International Standard Bible Encyclopedia [4]

a sôlt צוּר cūr ὁρμή hormḗ Siege Esther 8:11 hormḗ  Acts 14:5  Acts 17:5 ephistánai