ἡ τῆς παιδογονίας συνουσία → sexual intercourse for the purpose of bearing children
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.
persubtīlis,¹⁵ e, très subtil : Lucr. 3, 179