διατριβή
διατριβή
διατρῐβή, ἡ,
from διατρῑβω
a way of spending time: hence, a pastime (pass-time), amusement, Ar., Dem.
serious employment, study, Ar., Plat.,
a way of life, living, δ. ἐν ἀγορᾷ Ar.
in bad sense, a waste of time, delay, Eur.; in pl., Thuc.