N. dullness, heaviness, flatness, infestivity #, stupidity, want of originality, dearth of ideas, prose, matter of fact, heavy book, conte a dormir debout, platitude

V. be dull, prose, take au serieux, be caught napping, render dull, damp, depress, throw cold water on, lay a wet blanket on, fall flat upon the ear, no joke, serious matter (importance) 642

Adj. dull, dull as ditch water, unentertaining, uninteresting, flat, dry as dust, unfunny, unlively, logy, unimaginative, insulse, dry as dust, prosy, prosing, prosaic, matter of fact, commonplace, pedestrian, pointless, "weary stale flat and unprofitable", stupid, slow, flat, insipid, vapid, humdrum, monotonous, melancholic, stolid, plodding, boring, tiresome, tedious

Phr. davus sum non aedipus, deadly dull and boring, ddb