adj.
Pronunciation: ˌ pes-t ə - ' len(t)-sh ə l
Function: adjective
Date: 14th century
1 a : causing or tending to cause pestilence : DEADLY b : of or relating to pestilence
2 : morally harmful : PERNICIOUS
3 : giving rise to vexation or annoyance : IRRITATING
– pes · ti · len · tial · ly \ - ' len(t)-sh( ə -)l ē \ adverb