Glossolalia (from Greek γλωσσολαλιά an that from γλῶσσα - glossa "tongue, language" and λαλεῖν (lalein) "to talk") is the vocalizing of fluent speech-like but unintelligible utterances, often as part of religious practice. Its use (including use in this article) sometimes also embraces Xenoglossy - speaking in a natural language that was previously unknown to and that is not understood by the speaker.