end = bottom

No. Bottom.

CJ

Sir, would you please tell me when I should use "at the end (of)" and when I should use "at the bottom (of)"? Also, could "at the top (of)" be the opposite for both "at the end (of)" and "at the bottom (of)"?

Thank you.

At the end of the day.
At the bottom of the barrel.
At the top of the ladder.

Thanks for your reply, but I'm afraid, I still don't get what the difference between them is. Could you please explain a littel more with a few more examples that where I should use which expression or phrase?

The noun "bottom" usually refers to the lowest part/face/wall of something that can be considered a container of some sort.

A box of popcorn has only one bottom, but a stick has two ends.

"Top" is pretty much the opposite of "bottom."

Thank you so much, dear ozzourti, for your really helpful and informative reply. I'd like to ask you one more thing, please.

Could we also use the preposition "on" in those expressions? For example, could we also say "on the top of", "on the bottom of", or "on the end of". And will there be any difference if we do so?