1 uncomplicatedness; understandability, comprehensibility, lucidity, straightforwardness, clarity, intelligibility, decipherability:
Consider the simplicity of some life forms in contrast to the complexity of others. The simplicity of the Bible can be deceptive
2 plainness, cleanness, clarity, severity, starkness, austereness, asceticism, restraint, bareness, purity:
She prefers the simplicity of classical or very modern design to baroque and rococo clutter
3 sincerity, openness, artlessness, candour, guilelessness, frankness, unsophisticatedness, ingenuousness, straightforwardness, forthrightness, unaffectedness, unpretentiousness, modesty, naïvety; plainness, directness, inelegance, rusticity, pastoralism:
Many have been charmed by the simplicity of the local folk art.
4 stupidity, slow-wittedness, thickheadedness, simple-mindedness, feeble-mindedness, oafishness, cloddishness, obtuseness, dullness, dull-wittedness, witlessness, halfwittedness, imbecility, brainlessness:
The simplicity of some of those yokels is incredible.