strong
觩 centers on strength, particularly a strong, curved shape like a horn. The meaning is narrow and the kanji is rare, so treat its standalone sense as uncertain.
觩 combines 角 (horn) with 求, which may have contributed a phonetic element. The exact historical development is uncertain, and the modern form is rare.
A horn (角) that seeks (求) to be strong and curved: imagine a ram's horn growing in a powerful, bent shape.
For キュウ, picture a strong horn that is also a cue for strength: cue -> キュウ, and the horn's curve shows its power.