lexical pointers
derivationally related form
antonym
semantic pointers
also see
similar to
hard, arduous, backbreaking, grueling, gruelling, heavy, laborious, operose, punishing, toilsome
dragging
tiring, wearying, exhausting, wearing
heavy, labored, laboured
labor-intensive, labour-intensive
plodding, leaden
Sisyphean
straining, arduous, strenuous