The word 'Gayatri' has been derived from the root 'Gai * means to sing. It contains Gayatri protects the gayas. The gayas are the vital breaths (Pranah).So it protects the vital breaths. Because Gayatri protecthree syllables. The word Gayatri has been derived from Gayatra. So the term Gayatri has been traditionally derived from the two roots i.e. 'gai ' and 'trai', so it means as ascent responsible for both singing and protecting. Hence, speech is Gayatri.ts the Prana(gayantam trayate) so it is called Gayatri.