This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
颰 combines 風 (wind) with 犮, but the exact historical development and original meaning are uncertain.
With no clear meaning, picture the wind 風 whipping around a mysterious inner shape 犮, like a gust of wind carrying something unknown.
For ハツ, imagine a sudden gust of wind making a hat fly off: hat -> ハツ, as the wind 風 scatters everything.