simple

sim·ple(smpl) adj. sim·pler, sim·plest

1.Having or composed of only one thing, element, or part. See Synonyms at pure.
2.Not involved or complicated; easy: a simple task. See Synonyms at easy.
3.Being without additions or modifications; mere: a simple “yes” or “no.”
4.Having little or no ornamentation; not embellished or adorned: a simple dress.
5.Not elaborate, elegant, or luxurious. See Synonyms at plain.
6.Unassuming or unpretentious; not affected.
7.Having or manifesting little sense or intelligence.
8.Uneducated; ignorant.
9.Unworldly or unsophisticated. See Synonyms at naive.
10.Not guileful or deceitful; sincere.
11.Humble or lowly in condition or rank: a simple woodcutter.
12.Ordinary or common: a simple head cold.
13.Being a fundamental or rudimentary element; basic.
14.Not important or significant; trivial.

note definitions 1, 2, 3, 6, 7, 11 & 14.

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