This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
軑 combines 車 (vehicle) with 大 (big), but the exact historical development and original meaning are uncertain.
A big 大 vehicle 車: imagine a large cart or carriage, but its exact meaning is unclear.
For テイ, picture a big 大 vehicle 車 shaped like a table: table -> テイ, and the large cart is as flat as a table.
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