Welcome to Gaia! ::

I-myself.
Eye-what you see from.
You-who I am talking too.
u-a letter. More specifically a vowel.

I - spelled 'aye' - meaning yes.

I-noun,
1. the ninth letter of the English alphabet, a vowel.
2. any spoken sound represented by the letter I or i, as in big, nice, or ski.
3. something having the shape of an I.
4. a written or printed representation of the letter I or i.
5. a device, as a printer's type, for reproducing the letter I ori.
6. a word used to represent the writer as themself

Eye-
1. the organ of sight, in vertebrates typically one of a pair of spherical bodies contained in an orbit of the skull and in humans appearing externally as a dense, white, curved membrane, or sclera, surrounding a circular, colored portion, or iris, that is covered by a clear, curved membrane, or cornea, and in the center of which is an opening, or pupil, through which light passes to the retina.

You-pronoun
1. Archaic (except in some elevated or ecclesiastical prose). the personal pronoun of the second person singular in the nominative case (used to denote the person or thing addressed): Thou shalt not kill.
2. (used by the Friends) a familiar form of address of the second person singular.

U-
1. the 21st letter of the English alphabet, a vowel.
2. any spoken sound represented by the letter U or u, as in music, rule, curious, put, or jug.
3. something having the shape of a U.
4. a written or printed representation of the letter U or u.
5. a device, as a printer's type, for reproducing the letter U or u.

His definitions seem to be acturate.