Tzere (also spelled Tsere, Tzeirei, Zere, Zeire, Ṣerî, Ṣerê etc.; Hebrew: צֵירֵי IPA: [tseˈʁe], sometimes צירה) is a Hebrew niqqud vowel sign represented by two dots "◌ֵ" underneath a letter. In modern Hebrew, it indicates the phoneme /e/ which is the same as the "e" sound in sell and is transliterated as an "e". In modern Hebrew, tzere is pronounced the same as segol, although they were distinct in Tiberian Hebrew.
Tzere is usually written in these cases:
In declension tzere sometimes changes to other vowels or to shva. The full rules for these changes were formulated the Academy of the Hebrew Language.
In modern Hebrew there are words which are homophones and homographs in spelling without niqqud, but are written differently with niqqud, the difference being segol and tzere. For example, עֶרֶב evening and עֵרֶב weft are both pronounced [ˈʕeʁev] and written ערב without niqqud (these words also have different etymology).
Tzere can be written with and without matres lectionis. The most prominent mater lectionis for tzere is Yod (י), and in some cases it is used with the letters aleph (א) and he (ה).