This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
The exact historical development of 罤 is uncertain. It visually combines 罒 (net) and 弟, but the original semantic and phonetic roles are unclear.
The top 罒 suggests a net, and the bottom 弟 might hint at a younger brother or order. Without a clear meaning, picture a younger brother tangled in a net, representing something caught or uncertain.
For テイ, imagine a younger brother (弟) tangled in a net (罒) and calling out 'Tay!' for help: Tay -> テイ.