Synonymes dull (anglais)

Verbe
- action : deaden, shackle, dim, benumb, soften, blunt, tarnish
- activity : depress, deject, discourage, dishearten, dispirit, sadden

Adjectif
- behaviour : listless, flat, apathetic, slow, heavy, inanimate, placid, languid
- characteristic : stupid, faint, blunted, tedious, pedestrian, obtuse, backward, prosaic
- characteristic : boring, fatuous, foolish, depressing, inapt, drear, dim, uninteresting
- characteristic : blunt, unsharpened, pointless
- characteristic : colourless, gloomy, sober, sombre, drab, dark, dingy, dim
- property : sombre, fat, inactive, sad, inanimate, slack, inert, lifeless