But a is elided when preceded by e or o.

Now follow cases of non-elision.

The a is not elided in the following sections : those beginning with dhātā rātiḥ and upa ; those styled vājapeya ; those beginning with juṣṭa and śyenāya ; those styled ukhya ; those beginning with dhruvakṣitiḥ , iyam eva sā yā , and agnir mūrdhā ; the first and the next to the last of the rudra chapter ; and those styled vikarṣa , vihavya , hiraṇyavarṇīya , yājyā , and mahāpr̥ṣṭhya.

Also in am̐hasaḥ , am̐hatiḥ , aniṣṭr̥taḥ , avantv asmān , avadyāt , and ahani.

Also in anu , when preceded by gharmāsaḥ , āpaḥ , martaḥ , rathaḥ , tvaḥ , datte , and vātaḥ.

Also (after vātaḥ) in abhi vātu and apaḥ.

Also (after apaḥ) in anu and agamat.

Also in adbhiḥ , apāṃ napāt , and asmān , when preceded by āpaḥ.

In asmān , also , if followed by a , when rāye , saḥ , and indraḥ precede.

Also in adya , andhaḥ , am̐śuḥ , and agne , when te precedes.

In agne , also , when preceded by me.

As also , in asya , aśvinā , and aparā.

Also in asat , agniḥ , agha , antamaḥ , abhi , asmin , and adya pathi , when preceded by naḥ.

Also in agre , aśvebhyaḥ , and agriyāya , when preceded by namaḥ.

Also when āvinnaḥ or somaḥ precedes and agni follows.

Also a is retained when preceded by dhīrāsaḥ , adabdhāsaḥ , ekādaśāsaḥ , r̥ṣīṇāṃ putraḥ , śāryāte 'ṣāḍhaḥ , pitāraḥ , pr̥thivī yajñe , āsate ye , gr̥hṇāmy agre , vām̐ eṣaḥ , jajñe , sam̐sphānaḥ , yuvayor yaḥ , pr̥ṣṭhe , patir vaḥ , go , śuṣmaḥ , puvaḥ , samiddhaḥ , r̥ṣabhaḥ , pāthaḥ , vacaḥ , varṣiṣṭhe , juṣāṇo , yo rudraḥ , or vr̥ṣṇaḥ.

Also in aratim , asya yajñasya , atidrutaḥ , atiyanti , anr̥ṇaḥ , aviṣyan , anamīvaḥ , anneṣu , arciḥ , ajītān , ajyānim , ahniyāḥ , ambāli , arvantam , astu , akr̥ṇot , aṅgiraḥ , apsu yaḥ , askabhāyat , acyutaḥ , aśvasaniḥ , asthabhiḥ , aśiśret , aṅge , and aghniya.

Also in adhvara , when a vowel follows [the r].

In the opinion of some , it becomes half-similar with its predecessor.