nounnounadjective

el natural

natural

Algo que existe o sucede sin haber sido hecho o cambiado por las personas.

Natural has several related meanings:

Natural; found in or produced by nature: not artificial or manufactured.
Natural; normal or expected: occurring without special effort or being unsurprising.
Natural; spontaneous or unaffected: behaving or appearing without artificiality.
Native; originating from a place: used of a person from a particular location.
As a noun, a native or inhabitant of a place. In music, it can also refer to a natural note or a natural sign.

Natural is an adjective with the same form for masculine and feminine nouns. Its plural is naturales.

It can also function as a masculine or feminine noun: el natural or la natural.

It comes from Latin naturalis, meaning “relating to nature.”

espontáneo — “spontaneous”; emphasizes acting without planning, rather than nature itself.
normal — “normal”; overlaps when something is expected or typical.
nativo — “native”; emphasizes origin or birth in a place.

Antonyms depend on the meaning:

artificial — “artificial”; the opposite of natural when referring to something made or manufactured.
forzado — “forced”; the opposite when referring to behavior or expression.
extraño — “strange”; contrasts with natural when it means normal or expected.