The Collaborative International Dictionary
Pregravate
Pregravate \Pre"gra*vate\, v. t. [L. praegravatus, p. p. of
praegravare to be heavy upon, fr. praegravis very heavy.]
To bear down; to depress. [Obs.]
--Bp. Hall.
Wiktionary
pregravate
vb. (context obsolete nonce English) To bear down; to depress.