species of deer
麂 refers to a specific species of deer, a type of animal within the deer family.
麂 combines the deer radical 鹿 with the phonetic component 几, suggesting a type of deer. The exact historical development is uncertain.
A deer 鹿 with a small table 几 inside: picture a rare species of deer that is so small it can fit under a table.
For キ, imagine a key deer, a small species of deer found in the Florida Keys: key -> キ, and the deer is the key to remembering this kanji.