fight 
(fīt)
(fīt)v. fought (fôt), fight·ing, fights
v.intr.
1.
a. To attempt to harm or gain power over an adversary by blows or with weapons.
b. Sports To engage in a boxing match.
2. To engage in a quarrel; argue: They are always fighting about money.
3. To strive vigorously and resolutely, as in trying to overcome something; contend: fought against graft; fighting for her rights. See Synonyms at oppose.
v.tr.
1.
a. To contend with or oppose with violence or in battle.
b. To wage or carry on (a battle).
c. To contend for, as by combat: "I now resolved that Calais should be fought to the death" (Winston S. Churchill).
2.
a. Sports To box against (an opponent).
b. To participate in (a boxing match or other similar contest).
c. To cause (a boxer or other contestant) to fight in a match.
3.
a. To contend with or struggle against: fought his boss over every penny; fought temptation.
b. To try to prevent the development or success of: fought the attempt to close the school.
c. To try to extinguish (an uncontrolled fire).
4. To make (one's way) by struggle or striving: fought my way to the top.
n.
Phrasal Verb: 1. A confrontation between opposing groups in which each attempts to harm or gain power over the other, as with bodily force or weapons.
2.
a. A physical conflict between two or more individuals.
b. Sports A boxing match.
3. A quarrel or conflict: newlyweds having a fight over chores.
4. A struggle to achieve an objective: a fight for the attainment of civil rights.
5. The power or inclination to fight; pugnacity: I just didn't have any fight left in me.
fight off
Idioms: 1. To defend against or drive back (a hostile force, for example).
2. Baseball To hit (a pitch) into foul territory, especially in an effort to avoid being struck out.
fight fire with fire
To combat one evil or one set of negative circumstances by reacting in kind.
fight shy of
To avoid meeting or confronting.
[Middle English fighten, from Old English feohtan, fihtan.]
fight′a·bili·ty n.
fighta·ble adj.
fighting·ly adv.