The most common Sindarin word for the Valar was Belain or 'Powers', but Rodyn was a rarer alternative name. Its etymology is unclear, but it perhaps derives from a root-word meaning 'high' (and this supposition is supported by its Quenya equivalent Tárion, which evidently also means '(day) of the High Ones'. This association helps to explain how the Elvish name of the day dedicated to the Powers of Arda became adapted into Mannish as 'Highday'.