pray for good fortune
禨 centers on ritual prayer aimed at securing good fortune or auspicious outcomes.
禨 combines 示 (altar, spirit) with 幾, which likely contributes the sound and may hint at a subtle or incipient sign, together expressing prayer for favorable omens.
The left side 示 (礻) is an altar, and the right side 幾 looks like a person kneeling with arms raised in supplication. Picture someone at an altar praying earnestly for good fortune.
For キ, imagine a key (キー) that unlocks good fortune when you pray at the altar: key -> キ.