Parihāna-Dhamma
parihāna-dhamma:'liable to decline'."Now,someone reaches the attainments (absorptions:jhāna,q.v.) of the fine-material or immaterial sphere (s.avacara).But he does not reach them according to his wish,and not without trouble and exertion; and not according to his wish with regard to place,object and duration,does he enter them,or rise therefrom.Therefore it is well possible that such a monk,through negligence,may lose these attainments.Such a person is said to be liable to decline" (Pug.5).