Etymology In the senses of “overcrowd (a place)” and “impede (a person)”: from Middle French and Old French empestrer (“encumber”), influenced by English pest. The modern sense is an extension of the sense “infest”. Comparable to English construction pest + -er (used to form frequentative verbs).
That which eſpecialleſt nouriſht the moſt prime pleaſure in me, was after a ſtorme when they were driuen inſwarmes, and lay close peſtred together as thicke as they could packe; the next day following, if it were faire, they would cloud the whole skie with canuas, by ſpreading their drabled ſailes in the full clue abroad a drying, and make a brauer ſhew with them, then ſo many banners and ſtreamers diſplayed againſt the Sunne on a mountaine top.1599, [Thomas] Nashe, Nashes Lenten Stuffe, […], London: […] [Thomas Judson and Valentine Simmes] for N[icholas] L[ing] and C[uthbert] B[urby] […], →OCLC, pages 5–6:
Etymology In the senses of “overcrowd (a place)” and “impede (a person)”: from Middle French and Old French empestrer (“encumber”), influenced by English pest. The modern sense is an extension of the sense “infest”. Comparable to English construction pest + -er (used to form frequentative verbs).
1
A bother or nuisance.
By now I presumed I had become a real pester.2017, Samuel J. Archer, Will There Be Another Lincoln, Nixon, Johnson or Kennedy?, page 15: