Definition of grinding :
1. from Grind.
2. The softer inorganic matter composing part of the surface of the globe, in distinction from the firm rock; soil of all kinds, including gravel, clay, loam, and the like; sometimes, soil favorable to the growth of plants; the visible surface of the globe; the ground; as, loose earth; rich earth.
pulverizing, wearing away, corrasion, unspeakable, broken, utter, comminutive, rhythmic, disintegrating, utterly, eroding, shivering, contriteness, excruciating, bone-crushing, milling, powdering, cracking, attrition, scratch, splintering, excoriation, chopping, contrition, crushing, reducing to dust, scrape, downright, hopelessly, staccato, triturative, thorough, granulating, crunching, sadly, smashing, crumbling, such as it is, inaudible, detrition, sorry, two-tone, fricative
chafing (part of speech: verb)
friction (part of speech: noun)
smoothing (part of speech: verb)
difficult (part of speech: adjective)
harsh, arduous, onerous, demanding, difficult, troublesome, ticklish, strenuous, trying, adverse, wearying, burdensome, cumbersome, tricky, complex, uphill, complicated, oppressive, toilsome, bothersome, rough, cantankerous, thorny, finicky, wearisome, hard, knotty, formidable, tough, fussy, stressful, contrary, rugged, tight, severe, laborious
- He thought over his capabilities with the sensations of a soldier grinding his sword at the opening of a campaign. - "Desperate Remedies", Thomas Hardy.
- She leaned a little more forward, carried away with her fancy- that the shrill grinding of the pebbles was indeed the scream of human voices in pain! - "Jeanne of the Marshes", E. Phillips Oppenheim.
- There is nothing like it; long work, grinding weary work, work without pay, hopeless work; but work in which the worker trusts himself, believing it to be good. - "Orley Farm", Anthony Trollope.