This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
The historical origin of 拪 is uncertain. It visually combines 扌 (hand) and 西, but the exact development is unclear.
With no clear meaning, picture a hand 扌 holding something westward 西, but the purpose remains a mystery.
For セン, imagine a hand 扌 sending 西 westward: send -> セン, though the kanji's meaning is uncertain.