What is O in hieroglyphics?

Answer 1

Hieroglyphs did not include any vowel signs - just as in ancient Phoenician, ancient Arabic and ancient Hebrew writing. There are therefore no signs that mean a, e, i, o or u.

In some misleading web sites the English vowels are represented by hieroglyphs that actually stand for consonant sounds, some of them not found in English. For example the "lasso" sign (really a looped rope) is really the two-consonant sign with the sound value w3; this is often used by ignorant and unscrupulous websites to represent the letter o.

The moral of the story is that websites can not be relied upon to give accurate and correct readings of hieroglyphs - use books such as "How to Read Egyptian Hieroglyphs" by Mark Collier and Bill Manley instead.