per-subtīlis, e, adj.
I Lit., very fine or delicate , very subtle : animus persubtilis atque minutis Perquam corporibus factus, Lucr. 3, 179.—
II Trop., very ingenious : oratio, Cic. Planc. 24, 58.
per-subtīlis e, adj.,very ingenious: oratio. ...
An Elementary Latin Dictionary