Too (adverb)

1. To a higher degree than is desirable, permissible, or possible; excessively.
2. Also; in addition.
3. To the same extent (used in comparisons).
4. Used to indicate that a word, phrase, or piece of information is included in what is being referred to.

Origin:

Old english tō, of germanic origin; related to dutch te and german zu.

Examples:

1. He ate too much at the party and felt sick.
2. I want to go too!
3. You are too kind to me.
4. She wants to go to the beach too.
5. The book was too long for me to read.
6. I love pizza too, but I can't eat it every day.
7. I want to go to the party too, but I have to study for my exam.