pratyavAyaH 1 Decrease, diminution. 2 An obstacle, impediment; U. 1. 8. 3 A contrary or opposite course, contrariety; Ms. 4. 245. 4 A sin, an offence, sinfulness; anutpattiM taTA cAnye pratyavAyasya manvate Jābāli . 5 Disappointment. 6 Disappearance of an existing thing. 7 Non-production of what does not exist.