This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
The exact historical development of 奃 is uncertain. It visually combines 大 (big) on top and 氐 (base/foundation) below, but the original meaning and component relationship are unclear.
With 大 (big) over 氐 (base), picture a large foundation supporting something massive, but the exact meaning is unclear.
For テイ, imagine a big (大) table (テーブル, teeburu) resting on a low base: the first syllable テイ cues the reading.