Synonyms of monotonous in English:

monotonous


See definition of monotonous

adjective

1‘a monotonous job’

SYNONYMS
tedious, boring, dull, uninteresting, unexciting, wearisome, tiresome, repetitive, repetitious, unvarying, unchanging, unvaried, lacking variety, without variety, humdrum, ho-hum, routine, mechanical, mind-numbing, soul-destroying, prosaic, run-of-the-mill, uneventful, unrelieved, dreary, plodding, colourless, featureless, dry as dust, uniform, monochrome
informal deadly
British informal samey
North American informal dullsville
ANTONYMS

varied, interesting, exciting

2‘a monotonous voice’

SYNONYMS
toneless, flat, unvarying, uninflected, droning, soporific