Overview
Tav (also spelled Taw or Taf) is the twenty-second and last letter of a number of Semitic alphabets and abjads. Its basic consonantal value is /t/. The letter appears in ancient inscriptions and in modern scripts such as Hebrew (ת) and Arabic (ت), and it served as the ancestor of letters in several non-Semitic alphabets.
Forms and phonetic value
The shape of the letter varies by script: the Phoenician form gave rise to the square Hebrew ת, the rounded Aramaic and Syriac marks, and the Arabic ت. Across these systems the sound is typically a voiceless alveolar stop /t/. In Arabic a visually related letter, ث (Ṯāʼ), represents an interdental fricative /θ/ in many dialects. See the Phoenician and Aramaic traditions for early graphic models: Phoenician and Aramaic. A typical Syriac form is shown below.
Historical development
The letter traces back to early Proto-Canaanite and Proto-Sinaitic inscriptions, where alphabetic signs represented consonants. From Phoenician taw the shape and name were adopted and adapted by neighboring peoples; Greek Tau and, through Greek, Latin T descend from the same lineage. For discussions of its place among writing systems, consult sources on Semitic abjads and the evolution of alphabetic signs: alphabet history.
Variants and pronunciations
Pronunciation and orthographic behavior have differed by language and by historical period. In Hebrew, the letter name is Tav; historically the presence or absence of a diacritic (the dagesh) distinguished stop and fricative realizations in some traditions, though in modern Israeli Hebrew it is usually pronounced /t/. In Arabic the letter Tāʼ (ت) represents /t/; the related letter ث developed in the Arabic script to represent /θ/ in Classical and Modern Standard Arabic. See the entries for the Phoenician and Aramaic scripts for comparative forms.
Functions and cultural roles
Tav serves not only as a phoneme but also as a symbol. In Hebrew gematria the letter has numeric value and in biblical imagery the name "tav" appears in contexts meaning a mark or sign. As the final letter of the alphabet it sometimes carries connotations of ending or completeness in literary and liturgical uses. For modern script details see the Hebrew and Arabic alphabet pages: Hebrew alphabet and Arabic alphabet.
Notable distinctions
- Across scripts the basic identity—name, position as a late/alphabet-final character, and /t/ value—remains stable.
- Graphic evolution reflects local writing habits: angular square forms in Hebrew versus flowing cursive forms in Syriac and Arabic.
- Derivatives and related letters (for example Greek Tau, Latin T, and Arabic ث) illustrate how one consonantal sign can split into separate sounds and signs in different linguistic traditions.
For comparative charts and images of historical inscriptions consult specialized references and corpora of Semitic epigraphy and paleography; this article gives a concise summary of the letter's identity, development, and continuing roles in several languages and scripts.