ῥικνόομαι
A.
grow stiff or be shrivelled by frost, heat, or old age, Arist. HA 553a13, Opp. H. 5.593, Sor. 1.15.
II.
dance with unseemly contortions, S. Fr. 316, cf. Luc. Lex. 8.
III.
later Act., have sexual intercourse, πρὸς ἄνδρα, πρὸς γυναῖκα, PMag.Leid.W. 6.28.