dull
index
allay, alleviate, bleak (severely simple), diminish, drug, impair, inexpressive, insensible, insipid, languid, lessen, moderate (temper), mollify, nondescript, obfuscate, obnubilate, obscure, obtund, obtuse, opaque, pedestrian, phlegmatic, ponderous, prosaic, repress, soothe, stagnant, stale, stifle, subdue, sully, tarnish, thoughtless, torpid, trite, vacuous
Burton's Legal Thesaurus.
William C. Burton.
2006