Daleth

• daleth: (Hebrew) door

• dalet, daleth: the fourth letter of many Semitic alphabets, including Phoenician, Hebrew, and Aramaic. It has the sound of English d. The Phoenician letter gave rise to the Greek delta (Δ), Latin D and the equivalent in the Cyrillic alphabet
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Commentary

In Hebrew, daleth means both door and the letter d or dh (ד in the Hebrew alphabet. As the Hebrew alphabet does not have any vowels, daleth is how one would spell the, which is the last word in Finnegans Wake,