न+उङ्-धात्वोः

After the semi-vowel substitutes of the udatta ऊ 4.1.66 or of the udatta final vowels of the root, when preceded by a consonant, the weak case-endings beginning with a vowel do not take the acute accent. Thus ब्रह्मब॒॒न्ध्वा॑, ब्रह्मब॒॒न्ध्वे॑, धीरब॒॒न्ध्वा॑, धीरब॒॒न्ध्वे॑ from धीरबन्धू꣡, which has acute accent ऊ, because ऊ꣡ञ् is udatta 3.1.3, and the ekadesa of it, when it combines with the preceding vowel is also udatta 8.2.5. The व substituted for ऊ before the ending आ, is a semi-vowel substitute of an udatta (उदात्तयण्) the affix after it would have become udatta by the last sutra, but not being so, the general rule 8.2.4 applies and makes it svarita. Let us take an example of a semi-vowel substitute of the vowel of a root (धातु - यण्):- स॒॒कृल्ल्वा॑, सकृल्ल्वे॑; ख॒॒लप्वे॑ from सकृल्लू꣡, खलपू꣡ formed by क्विप् affix, the second member of the compound retaining its original accent, namely, the oxytone, the semi-vowel being substituted by 6.4.83 before the vowel case-endings.,