noun-modifying (irregular)
unwelcome; unwanted; undesirable
Formal, literary prenominal adjective. Used to describe a person or thing that is not welcome or desirable. Often found in written or formal contexts.
See also: 好ましからざる人物 (このましからざるじんぶつ)
An unwelcome person appeared at the venue.
It brought about an undesirable outcome.