Something is rare if you don't see it very often. It is very rare to see a person with different colored eyes. Another word for rare is uncommon. The opposite of rare is common.
Something is raw if it hasn't been cooked yet. The picture is of some raw meat. Anything that needs a lot of preparation to get to the finished product can also be called raw, such as raw cotton that needs to be spun and woven into cloth.
Retro is a style where things that were fashionable many years ago are back in fashion again. A retro style can be achieved by using actual old items, or by making new things that have an old look.
Something is ribbed if it has a raised pattern on it or markings that look a bit like ribs.
A fruit or vegetable is ripe if it is fully grown, and is sweet or otherwise ready to eat. The red tomato on the left of the picture is ripe, the other two are still ripening. They are under ripe.
Ripped is the past tense of rip. Something that has been damaged by being ripped is described as being ripped. A similar word to ripped is torn.
Something is rough if you touch it and you can easily feel all the little bits that make it up, and those little bits are hard and sharp. If you fall over on a rough surface you are likely to skin your knees. Some things, like sandpaper, are rough so they can be used to scrape the surface off something else. The opposite of rough is smooth.