P / per-gnārus
adjective

per-gnārus

fem. per-gnāra · neut. per-gnārum
that has a thorough knowledge of; that is very experienced; well versed in
that has a thorough knowledge of, that is very experienced, well versed in any thing (very rare): locorum pergnari, Sall. Fragm. ap. Non. 554, 21: colendi, App. Mag. p. 290, 34.