According to Newton Garver in his article ?What violence is? found in
Violence in Modern Literature, ?the Latin root of the word ?violence?
is a combination of two Latin words: the word ?vis? (force) and the
past participle of ?latus? of the word ?fero? (to carry). The Latin
word ?violare? is itself a combination of these two words and its
present participle ?violans? is a plausible source for the word
?violence?, so that the word ?violence? in its etymological origin,
has the sense of to carry force at or toward? (46).
My advisor believes that this etymology is wrong since she suspects
that ?violence? comes from vi-o-latus which means, rather, ?carry out
something THROUGH force?. This would mean that ?vis? is the instrument
(ablative case) NOT the object (accusative case) of the action.
Would you please help me clarify this problem?

Here is what etymonline.com says:
"violence Look up violence at Dictionary.com
    c.1290, "physical force used to inflict injury or damage," from
Anglo-Fr. and O.Fr. violence, from L. violentia "vehemence,
impetuosity," from violentus "vehement, forcible," probably related to
violare (see violate). Weakened sense of "improper treatment" is
attested from 1596. Violent is attested from c.1340. In M.E. the word
also was applied in ref. to heat, sunlight, smoke, etc., with the
sense "having some quality so strongly as to produce a powerful
effect."

violentia ae, f
violentus, violence, vehemence impetuosity, ferocity, fury: novi
hominis: fortu nae, S.: voltu-s, fierceness, O.


Power or force is, in Latin, vis, vim, vi, vires (f), where the cases
shown are nominative, accusative, ablative and nominative plural. The
other cases are not used. Vis viva, "living force," was the old name
for what is now called energy.
http://www.du.edu/~etuttle/classics/latin/latin20.htm

Magna vis conscientiae. The force of conscience is great.
http://www.righthandpointing.com/latin/?p=169

Ubi iudicat qui accusat, vis, non lex, valet.
(Publilius Syrus, Sententia 692)

When the one who accuses is also the one who judges, violence, not
law, is the winner.
http://www.righthandpointing.com/latin/?p=52


violatio -onis, f. injury, violation, profanation.

violator -oris, m. injurer, violator, profaner.

violens -entis, violent, furious, impetuous; adv. violenter.

violentia -ae, f. violence, impetuosity.

violentus -a -um, violent, vehement, furious, impetuous.

violo -are, to violate, outrage, injure.