(p. pr. & vb. n.) of Punish.

Herculean arduous backbreaking burdensome castigatory chastening chastising corrective crushing demanding disciplinary draining effortful exhausting fatiguesome fatiguing forced grueling hard hard-earned hard-fought heavy hefty inflictive killing labored laborious onerous operose oppressive painful penal penological punitive punitory retributive strained straining strenuous stressful taxing tiresome tiring toilsome torturous tough troublesome trying uphill weariful wearing wearisome wearying