vessel, receptacle, implement, instrument, ability
噐 centers on a container or tool that holds or does something: a vessel, receptacle, implement, or instrument. The ability sense extends from the idea of a person's capacity, like a vessel's capacity.
噐 is a variant form of 器. The character combines multiple 口 (mouths/containers) with 工, likely representing a crafted vessel or tool. The exact historical development is uncertain, but it is associated with containers and implements.
Four 口 (openings/containers) surround a central 工 (work/craft), like a crafted vessel with many compartments. Think of a multi-purpose tool or container made by skilled work.
For キ, imagine a key that opens a special vessel: key -> キ, and the key fits the crafted container.