Englishlacklustre
adjective
a limp and lacklustre speech:
uninspired, uninspiring, unimaginative, dull, humdrum, colourless, characterless, bland, insipid, vapid, flat, dry, lifeless, listless, tame, tired, prosaic, mundane, run-of-the-mill, commonplace, spiritless, lustreless, apathetic, torpid, unanimated;
uninteresting, boring, monotonous, dreary, tedious, wearisome.
▷antonyms inspired, brilliant.
lacklustre Oxford Dictionary of English