<p><strong>Adjective</strong></p><ul><li>easy to understand, deal with, use, etc.</li><li>not elaborate or artificial; plain</li><li>not ornate or luxurious; unadorned</li><li>unaffected; unassuming; modest</li><li>not complicated</li><li>not complex or compound; single</li><li>free of deceit or guile; sincere; unconditional</li><li>common or ordinary</li><li>not grand or sophisticated; unpretentious</li><li>humble or lowly</li><li>inconsequential or rudimentary</li><li>unlearned; ignorant</li><li>lacking mental acuteness or sense</li><li>unsophisticated; naive; credulous</li><li>composed of only one substance or element</li><li>not mixed</li><li>not divided into parts</li><li>not compound</li><li>uncompounded or without overtones; single</li><li>having only the head without modifying elements included</li><li>consisting of a main verb with no auxiliaries</li></ul><p><strong>Noun</strong></p><ul><li>an ignorant, foolish, or gullible person</li><li>something simple, unmixed, or uncompounded</li><li>simples: cords for controlling the warp threads in forming the shed on draw-looms</li><li>a person of humble origins; commoner</li><li>an herb or other plant used for medicinal purposes</li></ul>