DULL

I. adjective Etymology: Middle English dul; akin to Old English dol foolish, Old Irish dall blind Date: 13th century mentally slow ; stupid , 2. slow in perception or sensibility ; insensible , lacking zest or vivacity ; listless , slow in action ; sluggish , 4. lacking in force, intensity, or sharpness , not resonant or ringing , lacking sharpness of edge or point , lacking brilliance or luster , low in saturation and low in lightness, cloudy , tedious , uninteresting , ~ness also dulness noun ~y adverb Synonyms: see: ~ see: stupid II. verb Date: 13th century transitive verb to make ~ , intransitive verb to become ~