Taymanitic was the language and script of the oasis of Taymāʾ in northwestern Arabia, dated to the second half of the 6th century BC.^[1]

Taymanitic does not participate in the key innovations of Proto-Arabic, precluding it from being considered a member of the Arabic language family. It shares one key isogloss with Northwest Semitic: the change w > y in word-initial position. Examples include yrḫ for *warḫum 'moon, month' and ydʿ for wadaʿa 'to know'.^[2]

It is clear that Taymanitic script expressed a distinct linguistic variety that is not Arabic and not closely related to Hismaic or Safaitic, while it can tentatively be suggested that it was more closely related to Northwest Semitic.^[3]

Taymanitic exhibits two major features which are innovative:^[2]

1. The change w > y in word-initial position: yrḫ for *warḫum 'moon, month' and ydʿ for wadaʿa 'to know'.
2. The mergers *z, *ḏ > *z, *s³, *ṯ > *s³, and *ṣ, *ẓ > *ṣ (loss of interdentals).

Unlike Arabic, Taymanitic does not exhibit the merger of Proto-Semitic [s] and [ts].