to hinder, to detain
傺 centers on obstruction that stops movement or progress: hindering someone or detaining them so they cannot proceed.
傺 combines the person radical 亻 with 祭, which likely contributes the sound and may relate to ritual or stopping. The exact historical development is uncertain.
A person 亻 is stopped by a ritual 祭 barrier, like being detained at a ceremony. The person cannot move forward because the ritual blocks the way.
For テイ, imagine a person detained at a tea ceremony: tea -> テイ, and the ritual 祭 keeps the person 亻 from leaving.