This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
詺 combines 言 (speech) with 名 (name), likely suggesting naming or calling by name, but the exact historical development is uncertain.
Words 言 and a name 名 come together: perhaps someone is being named or called out. Without a clear meaning, picture a name tag being spoken aloud.
For ベイ, imagine a baby being named: the baby's first cry sounds like 'bay' (ベイ) as the name is announced.