Synonyms for dull

verb deaden (a sound or noise), especially by wrapping

verb make numb or insensitive

verb make dull or blunt

verb become less interesting or attractive

adjective lacking in liveliness or animation

adjective emitting or reflecting very little light

adjective being or made softer or less loud or clear

adjective so lacking in interest as to cause mental weariness

adjective (of color) very low in saturation; highly diluted

adjective not keenly felt

adjective slow to learn or understand; lacking intellectual acuity

adjective (of business) not active or brisk

adjective not having a sharp edge or point

adjective blunted in responsiveness or sensibility

adjective not clear and resonant; sounding as if striking with or against something relatively soft

adjective darkened with overcast