An Etymological Dictionary of Astronomy and Astrophysics

1. Having negative connotations; tending to disparage or belittle.
   

2. A pejorative word, expression, etc.

Etymology (EN): From Fr. péjoratif, from L.L. peiorat-, p.p. stem of peiorare “make worse,” from L. peior “worse,” related to pessimus “worst,” pessum “downward, to the ground,” from PIE *ped-yos-, comparative of root *ped- “to walk, stumble, impair,” → foot.

Etymology (PE): Pastârandé agent noun from pastârdan, → pejorate.