Possibility \#7

Possibility #7

When ṃ is followed by a vowel,

ṃ may be elided.

In this case, the vowel may be lengthened.

e.g. imaṃ + ahaṃ > imāhaṃ

In Kaccāyana this is called (38) kvaci lopaṃ

and (15) dīghaṃ.

ṃ elided before a vowel + vowel lengthened

imaṃ	ahaṃ	imāhaṃ	this I
ekaṃ idaṃ	ahaṃ	ekamidāhaṃ	this one I
evaṃ	ahaṃ	evāhaṃ	like this I

Counter-examples:

ahaṃ eva > ahaṃ eva

etaṃ atthaṃ > etaṃ atthaṃ