Translation Spanish English: arduo

1 acrid, afflictive, arduous, backbreaking, bad, grueling, gruelling, hard, heavy, hot, irritating, laborious, operose, painful, piquant, pungent, punishing, rugged, salty, savory, savoury, sore, spicy, toilsome, tough, zesty.

2 acrimonious, afflictive, arduous, backbreaking, bitter, grueling, gruelling, hard, heavy, laborious, nerve-racking, nerve-wracking, operose, painful, punishing, sore, stressful, toilsome, tough, trying.

3 afflictive, arduous, backbreaking, bad, baffling, elusive, grueling, gruelling, hard, heavy, knotty, labored, laborious, laboured, operose, painful, problematic, problematical, punishing, sore, strained, toilsome, tough.

4 afflictive, arduous, backbreaking, deplorable, distressful, distressing, disturbing, grueling, gruelling, hard, heavy, laborious, lamentable, operose, painful, perturbing, pitiful, punishing, sad, severe, sore, sorry, toilsome, troubling, worrisome, worrying.

5 annoying, arduous, backbreaking, boring, bothersome, deadening, dull, galling, grueling, gruelling, hard, heavy, ho-hum, irksome, irritating, laborious, leaden, lumbering, nettlesome, operose, pesky, pestering, pestiferous, plaguey, plaguy, ponderous, punishing, slow, teasing, tedious, tiresome, toilsome, vexatious, vexing, wearisome.

6 arduous, austere, awkward, backbreaking, callous, difficult, dour, embarrassing, fibrous, forbidding, grim, grueling, gruelling, hard, hard-boiled, hardhearted, heartless, heavy, indurate, knockout, laborious, operose, pachydermatous, punishing, rocky, rough, severe, sinewy, stern, sticky, stiff, stifling, stringy, sulfurous, sulphurous, sultry, toilsome, tough, toughened, unchewable, unenviable, unyielding.

7 arduous, awkward, backbreaking, delicate, difficult, embarrassing, grueling, gruelling, hard, heavy, laborious, operose, punishing, sticky, ticklish, toilsome, touchy, troublesome, unenviable.

8 arduous, backbreaking, bad, big, critical, decisive, dreadful, formidable, grueling, gruelling, hard, heavy, knockout, laborious, operose, punishing, rocky, rough, severe, terrible, toilsome, wicked.

9 arduous, backbreaking, baffling, difficult, elusive, grueling, gruelling, hard, heavy, knotty, labored, laborious, laboured, operose, problematic, problematical, punishing, rugged, toilsome, tough, troubled, trying.

10 arduous, backbreaking, baffling, elusive, grueling, gruelling, hard, heavy, intemperate, knotty, laborious, operose, problematic, problematical, punishing, toilsome, tough, toughened.

11 arduous, backbreaking, big, clayey, cloggy, dense, enceinte, expectant, fleshy, grave, gravid, great, grievous, grueling, gruelling, hard, heavy, impenetrable, intemperate, labored, laborious, laboured, large, leaden, lowering, lumbering, operose, overweight, ponderous, profound, punishing, sonorous, sound, sullen, threatening, toilsome, wakeless, weighed down, weighty, with child.

12 arduous, backbreaking, blue, dense, depressed, dispirited, down, down in the mouth, downcast, downhearted, gloomy, grim, grueling, gruelling, hard, heavy, impenetrable, important, laborious, low, low-spirited, operose, punishing, serious, significant, toilsome.

13 arduous, backbreaking, concentrated, difficult, grueling, gruelling, hard, heavy, intemperate, knockout, laborious, operose, punishing, severe, strong, surd, toilsome, tough, unvoiced, voiceless.

14 arduous, backbreaking, demanding, grueling, gruelling, hard, heavy, intense, laborious, operose, potent, punishing, rugged, severe, stiff, strong, terrible, tight, toilsome, tough, wicked.

15 arduous, backbreaking, earnest, grueling, gruelling, hard, heavy, laborious, operose, punishing, sincere, solemn, toilsome.

16 arduous, backbreaking, grueling, gruelling, hard, hardworking, heavy, industrious, laborious, operose, punishing, tireless, toilsome, untiring.

17 arduous, backbreaking, grueling, gruelling, hard, heavy, laborious, operose, punishing, straining, strenuous, toilsome.

18 arduous, backbreaking, grueling, gruelling, hard, heavy, laborious, operose, punishing, tired, toilsome, troublesome, unreassuring, worrisome.

19 bad, big, firm, hard, harsh, impregnable, intense, inviolable, mighty, potent, powerful, resistant, robust, secure, solid, steadfast, steady, stiff, strong, substantial, tolerant, tough, toughened, unassailable, unattackable, unbendable, unfaltering, unshakable, unwavering.

20 besotted, blind drunk, blotto, buckram, cockeyed, crocked, firm, fuddled, loaded, pie-eyed, pissed, pixilated, plastered, potent, rigid, slopped, sloshed, smashed, soaked, soused, sozzled, squiffy, starchy, steadfast, steady, stiff, strong, tight, unbendable, unfaltering, unshakable, unwavering, wet.