crassesco, ĕre, v. inch., to grow thick, to thicken, grow dense or hard, grow large or fat (post-Aug.; most freq. in Pliny the elder): turtures milio, etc., Col. 8, 9, 2: sues, Plin. 13, 18, 32, § 110: ceparum capita, id. 19, 6, 32, § 103: pili quadrupedibus senectute, id. 11, 39, 94, § 231: mel (opp. dilutum), id. 11, 13, 13, § 32; cf.: vinum vetustate, id. 23, 1, 22, § 40: aër in nubes, id. 2, 43, 44, § 114: crassescente limo, id. 33, 5, 26, § 86.