up, uneven
攲 centers on a state of being tilted or not level: something that is up on one side and down on the other, hence uneven. The given meanings "up" and "uneven" both point to this idea of asymmetry or inclination.
The exact historical development of 攲 is uncertain. It visually combines 奇 (strange, odd) and 支 (branch, support), which may suggest something leaning or uneven, but this is speculative.
The left side 奇 suggests something odd or strange, and the right side 支 looks like a hand holding a stick. Picture a strange, unevenly balanced stick that is tilted up on one end.
For キ, imagine a key stuck under one side of an uneven table, tilting it up: key -> キ, and the table becomes uneven.