Synonyms of laborious in English:

laborious


See US English definition of laborious

See UK English definition of laborious

See Spanish definition of laborioso

adjective

1‘tunnelling was a laborious and dangerous job’

SYNONYMS
arduous, hard, heavy, difficult, strenuous, gruelling, murderous, punishing, exacting, tough, formidable, onerous, burdensome, back-breaking, trying, uphill, relentless, stiff, challenging, Herculean
tiring, fatiguing, exhausting, wearying, wearing, taxing, enervating, demanding, wearisome
tedious, boring, irksome
British informal knackering
archaic toilsome
rare exigent
ANTONYMS

easy, simple

2‘Doug's slow laborious style’

SYNONYMS
laboured, strained, forced, contrived, affected, studied, stiff, stilted, unnatural, artificial, overdone, overwrought, heavy, ponderous, convoluted, not fluent, elaborate, over-elaborate, intricate, ornate, prolix
ANTONYMS

effortless, natural