to ward off, to parry, to keep out (e.g. wind, rain or cold)
傏 centers on defensive action: warding off, parrying, or keeping something out, especially wind, rain, or cold.
傏 is a phono-semantic compound: the person radical 亻 suggests a human action, and 唐 likely provides the sound. The exact historical development is uncertain.
A person 亻 standing beside 唐, which looks like a shelter with a roof 广 and an opening 口. Imagine someone using a shelter to ward off wind and rain.
For トウ, picture a person using a towel to parry the cold: towel -> トウ, and the person 亻 keeps the cold out.