- simple [adj1] clear, understandable; easy child’s play*, cinch*, clean, easy as pie*, effortless, elementary, facile, incomplex, intelligible, light, lucid, manageable, mild, no problem*, no sweat*, not difficult, picnic*, piece of cake*, plain, quiet, self-explanatory, simple as ABC*, smooth, snap*, straightforward, transparent, uncomplicated, uninvolved, unmistakable, untroublesome, walkover*; concept 529 —Ant. complex, complicated, convoluted, difficult, exacting, intricate, unclear, unintelligible simple [adj2] uncluttered, natural absolute, austere, classic, clean, discreet, elementary, folksy, homely, homey, humble, inelaborate, lowly, mere, modest, not complex, open and shut*, plain, pure, pure and simple*, rustic, sheer, single, Spartan, unadorned, unadulterated, unaffected, unalloyed, unblended, uncombined, uncomplicated, uncompounded, undecorated, unelaborate, unembellished, unfussy, unmitigated, unmixed, unornamented, unostentatious, unpretentious, unqualified, vanilla*; concepts 562,589 —Ant. cluttered, decorated, embellished, jumbled, ornate simple [adj3] childlike, innocent amateur, artless, bald, basic, childish, direct, frank, green, guileless, honest, ingenuous, naive, naked, natural, plain, sincere, square, stark, trusting, unaffected, unartificial, undeniable, unexperienced, unpretentious, unschooled, unsophisticated, unstudied, unvarnished; concepts 267,401,542 —Ant. mature, older, sophisticated simple [adj4] feeble-minded; not intelligent amateur, asinine, backward, brainless, credulous, dense, dimwitted, dull, dumb, fat, feeble, foolish, green*, gullible, half-witted, idiotic, ignorant, illiterate, imbecile, inane, inexperienced, inexpert, insensate, mindless, moronic, nitwitted, obtuse, senseless, shallow, silly, simpleminded, slow, soft, soft-headed*, stupid, thick, uneducated, unintelligent, witless; concept 402 —Ant. aware, intelligent, on-the-ball, smart
New thesaurus. 2014.