Synonyms of the word

impair

• v. (transitive) To weaken; to affect negatively; to have a diminishing effect on.
• v. (intransitive, archaic) To grow worse; to deteriorate.
• adj. (obsolete) Not fit or appropriate.

damage

• n. Injury or harm; the condition or measure of something not being intact.
• n. (slang) Cost or expense.
• v. (transitive) To impair the soundness, goodness, or value of; to harm or cause destruction.

deflower

• v. (transitive) To take the virginity of (somebody), especially a woman or girl.

mar

• v. To spoil, to damage.
• n. A blemish.
• n. A small lake.

spoil

• v. (transitive, archaic) To strip (someone who has been killed or defeated) of their arms or armour.
• v. (transitive, archaic) To strip or deprive (someone) of their possessions; to rob, despoil.
• v. (transitive, intransitive, archaic) To plunder, pillage (a city, country etc.).
• v. (transitive, obsolete) To carry off (goods) by force; to steal.
• v. (transitive) To ruin; to damage (something) in some way making it unfit for use.
• v. (transitive) To ruin the character of, by overindulgence; to coddle or pamper to excess.
• v. (intransitive) Of food, to become bad, sour or rancid; to decay.
• v. (transitive) To render (a ballot paper) invalid by deliberately defacing it.
• v. (transitive) To reveal the ending of (a story etc.); to ruin (a surprise) by exposing it ahead of time.
• n. (Also in plural: spoils) Plunder taken from an enemy or victim.
• n. (uncountable) Material (such as rock or earth) removed in the course of an excavation, or in mining or…

vitiate

• v. (transitive) to spoil, make faulty; to reduce the value, quality, or effectiveness of something.
• v. (transitive) to debase or morally corrupt.
• v. (transitive, archaic) to violate, to rape.
• v. (transitive) to make something ineffective, to invalidate.