per-callesco, callŭi, 3, v. inch. n. and a. *
I Neutr. , to become very hardened , very callous : civitatis patientia percalluerat, Cic. Mil. 28, 76.—
II Act. , to get a good knowledge of; in perf. , to be well acquainted with , to know well , be well versed in : usum rerum, Cic. de Or. 2, 34, 137; so, disciplinas Stoicas et dialecticas, Gell. 1, 22, 7: leges, id. 20, 1, 20: quinque et viginti gentium linguas, id. 17, 17, 2.