Merriam-Webster Collegiate Dictionary - crude

 I. adjective  (~r; ~st)  Etymology: Middle English, from Latin crudus raw, ~, undigested — more at raw  Date: 14th century  1. existing in a natural state and unaltered by cooking or processing ~ oil  2. archaic unripe, immature  3. marked by the primitive, gross, or elemental or by uncultivated simplicity or vulgarity a ~ stereotype  4. rough or inexpert in plan or execution a ~ shelter  5. lacking a covering, glossing, or concealing element ; obvious ~ facts  6. tabulated without being broken down into classes the ~ death rate  Synonyms: see rude  • ~ly adverb  • ~ness noun  II. noun  Date: circa 1904 a substance in its natural unprocessed state; especially unrefined petroleum