(a)naturalexisting in or produced by nature; not artificial or imitation“a natural pearl”, “natural gas”, “natural silk”, “natural blonde hair”, “a natural sweetener”, “natural fertilizers”
(s)naturalfunctioning or occurring in a normal way; lacking abnormalities or deficiencies“it's the natural thing to happen”, “natural immunity”, “a grandparent's natural affection for a grandchild”
(s)natural, instinctiveunthinking; prompted by (or as if by) instinct“a cat's natural aversion to water”, “offering to help was as instinctive as breathing”
(s)natural, raw, rude(used especially of commodities) being unprocessed or manufactured using only simple or minimal processes“natural yogurt”, “natural produce”, “raw wool”, “raw sugar”, “bales of rude cotton”