The final ā of a root is elided before an ārdhadhātuka affix with the augment iṭ as well as when it begins with a vowel and has an indicatory k or ṅ,
Thus पपिथ and तस्थिथ ॥ Here the affix has the इट् augment. पपतुः, पपुः, तस्थतुः, तस्थुः ॥ Here the affixes are कित् by 1.2.5 गोदः, कम्बलदः with the affix क 3.2.3. So also प्रदा (fem), प्रधा (fem) by अङ् 3.3.106. Before Sarvadhatuka affixes, we have यान्ति, वान्ति, व्यत्यरे and व्यत्यले ॥ The two letter are the Imperfect Ist Person Singular Atmanepada of रा and ला with the affix इ (इट्). When it does not begin with a vowel, we have ग्लायते, दासीय ॥,