verb

• (transitive) To declare or find innocent or not guilty.
  "[W]hen God ſaith of himſelfe, that he is one who acquiting will not acquite the wicked, his meaning is, that whatſoeuer may be ſuppoſed becauſe of his patience, yet he will not fully and finally diſcharge thoſe who goe on ſtill in their vngodly courſes, and preſume vpon his Mercy, without repentance."
• (transitive) To discharge (for example, a claim or debt); to clear off, to pay off; to fulfil.
  "Although it pleaſed you this other night (occasion by me unhappily miniſtred) to intertaine time with an ordinarie profeſſion of love, yet (maſter Rinaldo) you doe both me and your ſelfe great injurie to continue your needleſſe labour with ſuch importunancie to me. […] Thus muche (being your firſte attempt) I thought it good to anſwere, leaſt you ſhould think with needleſſe niceneſſe I acquited your courteſies."
• (transitive) to discharge, release, or set free from a burden, duty, liability, or obligation, or from an accusation or charge. [with of or (formerly) from]
  "The jury acquitted the prisoner of the charge."
• (reflexive) To bear or conduct oneself; to perform one's part.
  "The soldier acquitted herself well in battle."