Use the word pretty to describe something with a delicate and pleasant appearance. Something that’s pretty is less powerful and intimidating than something that’s beautiful, the way a pretty floral raincoat is less intimidating than a beautiful film star.
Something that is pretty. "We'll stop at the knife store a look at the sharp pretties. Somewhat, fairly, quite; sometimes also (by meiosis) very. Cunning; clever, skilful. Pleasant in sight or other senses; attractive, especially of women or children. Of objects or things: nice-looking, appealing.
USA Today: 'Pretty girl humor,' 'The Lorax' costume and why Halloween is already dividing the internet
'Pretty girl humor,' 'The Lorax' costume and why Halloween is already dividing the internet