Ṭēth是许多闪米特字母表中的第九个字母，包括腓尼基字母、亚兰字母、希伯来字母ט‎（Tet）、叙利亚字母ܛ以及阿拉伯字母ط（Ṭāʾ，现代为第16个阿拉伯字母）。

该字母的发音为/tˤ/，这是闪米特语言中的强辅音（emphatic consonant）。

Teth还发展为了希腊字母Θ与西里尔字母Ѳ。

Teth, also written as Ṭēth or Tet, is the ninth letter of the Semitic abjads, including Phoenician Ṭēt , Hebrew Ṭēt ט, Aramaic Ṭēth , Syriac Ṭēṯ ܛ, and Arabic Ṭāʾ ط. It is 16th in modern Arabic order. The Persian Ța is pronounced as a hard "t" sound and is the 19th letter in the modern Persian alphabet. The Phoenician letter also gave rise to the Greek theta (Θ), originally an aspirated voiceless alveolar stop but now used for the voiceless dental fricative.