This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
The exact historical development of 仠 is uncertain. It visually combines 亻 (person) and 干, but the original meaning and component relationship are unclear.
Since the meaning is unclear, picture a person 亻 standing beside a shield or pole 干, but the scene is ambiguous—like a character whose story has been lost.
For カン, imagine a person 亻 holding a can 干: can -> カン, though the kanji's meaning remains a mystery.