P / per-tĕnŭis
adjective

per-tĕnŭis

neut. per-tĕnue
very thin; very small; fine
very thin, very small or fine.
Lit.: sabulum pertenue, Plin. 18, 6, 7, § 34.—
very slight; slender; very weak figuratively
Trop., very slight or slender, very weak: spes salutis, Cic. Fam. 14, 3, 2: discrimen, id. Agr. 2, 32, 87: suspicio, id. Clu. 60, 168: argumentum, Cic. Verr. 1, 6, 17: ars, id. de Or. 1, 23, 107.