pash · verb, noun1
Clipping of passion.
pash · noun2
Scots word for the pate, or head.
pash · verb, noun3
Perhaps of imitative origin, or compare bash. For the senses "rain heavily", "a heavy rain" (perhaps also imitative), compare plash, blash, clash (“heavy rainfall”).
Etymology from Wiktionary, CC BY-SA 4.0.