rivers and mountains; the natural scenery of a country

easy; not difficult; simple; also used as a prefix equivalent to the English suffix "-able" or "-ible"

to change, alter, or transform; to switch from one thing to another

a person's natural character or temperament; innate personality traits

difficult; hard to do; troublesome; not easy; problematic; the opposite of 容易 róng​yì

To change, alter, or transform (e.g., of one's nature, customs, or positions)