गतिर् गतौ

Thus अभ्यु꣡द्धरति, स॒॒मुदा꣡मयति, अभि॒॒सं॒॒प॒॒र्या꣡ हरति ॥ Why do we say गतिः \a Gati becomes &c\? Observe दे꣡वदत्तः प्रपचति ॥ Here देवदत्त is a Pratipadika and does not lose its accent. Why do we say 'when followed by a Gati'? Observe आ꣡ मन्द्रैरिन्द्र हरिभि र्याहि मयूर रोमभिः ॥ Here आ is a Gati to the verb याहि, the complete verb is आयाहि ॥ But as आ is not followed by a Gati, but by a Pratipadika मन्द्र, it retains its accent. Had the word गतौ not been used in the sutra, this आ would have lost its accent, because the rule would have been too wide, without any restriction of what followed it.,