natural

*second nature to someone

easy and natural for someone. (*Typically: be ~; become ~.) Swimming is second nature to Jane. Flying a helicopter is no problem for Bob. It's become second nature to him.

See also: nature, second

die a natural death 

1. Lit. [for someone] to die by disease or old age rather than by violence or foul play. I hope to live to 100 and die a natural death. The police say she didn't die a natural death, and they are investigating.

2. Fig. [for something] to fade away or die down. I expect that all this excitement about the scandal will die a natural death. Most fads die a natural death.

See also: death, die

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die a death  (British) also die a natural death (American & Australian)

to fail and end The principle of free health care for everyone is likely to die a death in the next ten years. The play, like so many others, died a natural death after only one week.

See also: death, die

natural-born  (informal)

having the qualities and abilities which you need in order to be good at doing a particular thing (always before noun) Carl was a natural-born salesman, and quickly expanded the company's world-wide sales.