quick, sudden
霍 centers on something happening with sudden speed: quick, abrupt, or instantaneous.
霍 combines 雨 (rain) with 隹 (bird). The traditional explanation is that it depicts a bird flying swiftly through rain, conveying suddenness or speed.
Rain 雨 falls suddenly on a bird 隹, making it dart away in a quick, sudden motion.
For カク, imagine a sudden clap of thunder that makes the bird fly away: clap -> カク, and the bird's quick escape matches the kanji's meaning.