What is the meaning of Tch?

a representation of the dental click used to show disapproval or disgust; tut, tsk

A letter of the practical Hadza alphabet.

A letter of the Juǀ'hoan alphabet, written in the Latin script.

A letter of the Naro alphabet, written in the Latin script.

A letter of the Sandawe alphabet, written in the Latin script.

A letter of the Walloon alphabet, written in the Latin script.

Source: wiktionary.org