Readings & Meanings:
to ask, to visit, to hear
Pardon me for asking, but where is the nearest station?
司 is a pictograph of a person looking through a narrow hole. 伺 adds another person to the pictograph, so it's now a person looking through a narrow opening at another person. Hence, look in on, ask after, inquire.
Ugh. When I first saw this kanji, I doubted my memory. I thought, "What? Is this 何? Or 同じ?"
伺 truly does look like a mashup of the two. Remember, if you have to ASK if it's 何 or 同, it's probably 伺.
Oh yes, and 伺う is very formal. Tego. It would be strange to use it together with casual speech.