The word prathama when first in a compound optionally retains its original accent when meaning 'a novice'.,
Thus प्रथमवैयाकरणः or प्रथमवैयाकरणः = संप्रतिव्याकरणमध्येतुं प्रवृत्तः 'one who has recently commenced to study Grammar'. The word प्रथम is derived from प्रथ by अमच् (Unadi V. 68) and by चित् accent the acute falls on the last. Why do we say when meaning 'a Novice?' Observe प्रथमवैयाकरणः (वैयाकरणानामाद्यो मुख्यो वा यः सः) 'the first Grammarian or a Grammarian of the first rank'. It will always have acute on the final.,