The Collaborative International Dictionary
Absonous
Absonous \Ab"so*nous\, a. [L. absonus; ab + sonus sound.]
Discordant; inharmonious; incongruous. [Obs.] ``Absonous to
our reason.''
--Glanvill.
Wiktionary
absonous
a. (context obsolete English) discordant; inharmonious; incongruous. (Attested from the early 17th century until the mid 18th century.)(R:SOED5: page=9)