This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
鑯 combines 金 (metal) with 韱, which likely contributes a phonetic element. The exact historical development is uncertain.
With 金 (metal) on the left and the complex 韱 on the right, this kanji likely relates to a metal tool or object, but its specific meaning is obscure.
For セン, imagine a metal tool making a sharp 'sen' sound as it carves: sen -> セン, tied to the metal radical 金.