Geresh ( in Hebrew: or , or medieval ) is a sign in Hebrew writing. It has two meanings.

Diacritic

As a diacritic, the Geresh is written immediately after (left of) the letter it modifies. It indicates three sounds native to speakers of modern Hebrew that are common in loan words and slang: as in judge, as in measure and as in ch****urch. In transliteration of Arabic, it indicates Arabic phonemes which are usually allophones in modern Hebrew: is distinguished from and is distinguished from. Finally, it indicates other sounds foreign to the phonology of modern Hebrew speakers and used exclusively for the transliteration of foreign words: as in then, as in thin, ; and, in some transliteration systems, also, and. It may be compared to the usage of a following h in various Latin digraphs to form other consonant sounds not supported by the basic Latin alphabet, such as "sh", "th", etc.

Loanwords, slang, foreign names and transliterations

Transcriptions of Arabic

There are six additional letters in the Arabic alphabet. They are Ṯāʾ, Ḫāʾ, Ḏāl, Ḍād, Ẓāʾ, and Ghayn. Also, some letters have different sounds in Arabic phonology and modern Hebrew phonology, such as Jīm.

Transliteration of foreign names

Yiddish origin

Some words or suffixes of Yiddish origin or pronunciation are marked with a geresh, e.g. the diminutive suffix לֶ׳ה – -le, e.g. יענקל׳ה – Yankale (as in Yankale Bodo), or the words חבר׳ה –, 'guys' (which is the Yiddish pronunciation of Hebrew חברה 'company'), or תכל׳ס – , 'bottom-line'.

Punctuation mark

The geresh is used as a punctuation mark in initialisms and to denote numerals.

Indicating initialisms

In initialisms, the Geresh is written after the last letter of the initialism. For example: the title גְּבֶרֶת (literally "lady") is abbreviated גב׳, equivalent to English "Mrs" and "Ms".

Denoting a numeral

A Geresh can be appended after (left of) a single letter to indicate that the letter represents a Hebrew numeral. For example: ק׳ represents 100. A multi-digit Hebrew numeral is indicated by the Gershayim ⟨״⟩.

Cantillation mark

As a note of cantillation in the reading of the Torah, the Geresh is printed above the accented letter:. The Geresh Muqdam (lit. 'a Geresh made earlier'), a variant cantillation mark, is also printed above the accented letter, but slightly before (i.e. more to the right of) the position of the normal Geresh:. As a cantillation mark it is also called Ṭères (טֶרֶס)‎.

Computer encoding

Most keyboards do not have a key for the geresh. As a result, an apostrophe ( ', Unicode U+0027) is often substituted for it.