thirteen
From LSJ
σκληρόν σοι πρὸς κέντρα λακτίζειν → it is hard for thee to kick against the pricks, it is hard for you to kick against the goads
English > Greek (Woodhouse)
adj.
Ar. and P. τρισκαίδεκα, P. τρεισκαίδεκα.
Thirteen years old, adj.: P. τρισκαιδεκέτης.