περκ-άζω,
(πέρκος ={περκνός}) become dark, turn dark, of grapes beginning to ripen, ὀπώρα ἄκραισι περκάζουσα οἰνάνθαις [[ 4th c.BC: Chaeremon Tragicus 12.2; ὅταν ἄρτι π. σταφυλή 4th-3rd c.BC: Theophrastus Philosophus “Historia Plantarum” 9.11.7, compare “Hymnus ad Isim” 168, LXX.Amos.9.13; ὅταν ἄρχωνται π. οἱ βότρυες 4th-3rd c.BC: Theophrastus Philosophus “de Causis Plantarum” 3.16.3, etc. ] LXX+4th c.BC+]; of olives, [[ “Geoponica” 9.19.2 ] Refs]; of flowers, [[ 3rd c.AD: Porphyrius Tyrius Philosophus “Vita Pythagorae - Porphyrii Opuscula” 44. ] Refs 3rd c.AD+]
__2 metaphorically, of young men, whose beard begins to darken their faces, [[ 3rd c.BC: Callimachus Epicus “Lavacrum Palladis” 76. ] Refs 3rd c.BC+]
__II active, make dark-coloured, [[ 1st c.AD: Dioscorides (Dioscurides) Medicus 5.2. ] Refs 1st c.AD+]