Complex sentence: The usual cognate to "sva/sa" syllable of Sanskrit is "ngha/ŋh" syllable of Avestan, as generally found in cognate-pairs like Vivasvan-Vivanghat and Rasa-Rangha.
Split into simpler sentences: The usual cognate to "sva/sa" syllable of Sanskrit is "ngha/ŋh" syllable of Avestan. As generally found in cognate-pairs like Vivasvan-Vivanghat and Rasa-Rangha.