The top one has a
which is a pot, and the top two
are two feet.
The bottom one has the top same as the top character, plus the bottom two parts which are hands.
So what we have is a picture seeing from top down : two hands hold a big pot, ascending sacrificial altar. The process is ascending.
The top character has no hands, may be from different angle, people could only see the feet, not the hands. Anyway, both have the same meaning: Ascend.
The small seal script for the character is
The bottom part is similar, the top two feet are small seal script for feet.
The clerical script for the character is
The current standard printing script is
Its pinyin is Deng1.