collide, meet unexpectedly
掽 centers on forceful contact or unexpected encounter: colliding, bumping into something, or meeting by chance.
掽 combines 扌 (hand) with 並 (line up, row). The exact historical development is uncertain, but the combination likely suggests hands coming together or meeting, which fits the ideas of colliding or encountering.
A hand 扌 meeting a row 並 of objects: imagine pushing a line of dominoes and causing them to collide unexpectedly.
For ホウ, picture a hand colliding with a row of bottles and making a loud 'hoe!' sound: hoe -> ホウ, as the bottles bump together.