delirious talk
譫 centers on incoherent, feverish speech: the kind of delirious talk that comes from illness or a disturbed mental state.
譫 combines 言 (speech) with 詹, which likely contributes the sound and may relate to excessive or rambling talk. The exact historical development of 詹 within this character is uncertain.
The left side 言 means speech, and the right side 詹 looks like a complex, tangled structure. Picture words spilling out in a tangled, feverish stream: delirious talk.
For トウ, imagine a delirious person talking nonsense while wearing a towel on their head: towel -> トウ, and the tangled speech matches the kanji's meaning.