This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
樀 combines 木 (tree/wood) with 啇, which likely contributes a phonetic element. The exact historical development is uncertain.
The left side is 木 (tree/wood). The right side 啇 is a rare shape. Without a clear meaning, picture a wooden object whose purpose is unknown.
For テキ, imagine a wooden tool that makes a 'teki' sound when tapped: teki -> テキ.