Definition of assoils:
(v) :
(archaic) To absolve or release (someone) from blame or sin; to forgive, to pardon.
(v) :
(archaic) (law) Followed by from or of: to acquit (someone) from a criminal charge; to find (someone) not guilty; to clear.
(v) :
(archaic) To atone or expiate for (something).
(v) :
(archaic or obsolete) Followed by from or of: to release or set free (someone) from a liability, an obligation, etc.; to discharge.
(v) :
(obsolete) To clear up or resolve (a difficulty, doubt, problem, etc.); to absolve, to solve.
(v) :
(obsolete) To refute (an argument, an objection, etc.).