You don't look so well today.

you Pronoun

— Used instead of the name of the person being spoken to; it is a second-person pronoun. You are my best friend. Can I go to the shops with you? — Used to talk about anyone. You have to be 18 years old to see that film. She has problems with her eyes, and can't see you properly.

you Determinative

— Used before a word that means the person or people someone is talking to. You guys can leave now.

don't verb

— do not (negative auxiliary) — (nonstandard) does not — do not

don't interjection

— interjection

don't noun

— Something that must not be done (usually in the phrase dos and don'ts).

look Verb

— Someone looks at something when they move their head or move their eyes so that they can see the thing. Look at this picture! Isn't it beautiful? — The way that something looks is the way that it appears. A new car looks very nice until it gets dirty. That doughnut looks delicious.

so Adverb

— How much; very much. The box was so wide that the person was not able to take it through the door.

so Preposition

— With purpose. Saying the reason why someone does something. The person locks the door so no one is able to come in and take things. We help them so that they can get better.

well Adverb

— In a good way. He washed the table very well, so now it is very clean.

well Noun

— A hole in the ground for getting water or oil. There was no river nearby, so they dug a well to get water.

today Pronoun

— Today is the current day, the day that is happening now, the day between yesterday and tomorrow. Today is the first day of the rest of your life. I have class today. Today's meeting should be short. — Today is modern times; the present in general. Today we don't have many of the old problems but we have many new ones.