Keywords: natural, normal, of course, naturally
As a Verb or Adjective
To be what happens or is the case because it is part of the usual processes of life and has little or nothing to do with changes made by humans. English = (be) natural.
To be a part of someone's personality without them acting or changing themselves in any way. English = (be) natural.
To be usual and ordinary, and what people expect. English = (be) normal.
Used alone to show your strong agreement with what someone has said. You think this is something that everyone would know or agree with. English = 'Of course!', 'Naturally'