dhi is substituted for the Imperative affix hi when the tense-affix is not ṅit,
Under 3.4.88 हि is also पित् in the Vedas : and when it is पित्, it is not ङित् by 1.2.4. Thus रारन्धि, यन्धि and युयोधि in the following सोमरारन्धि अस्मभ्यं तद्धर्यश्व प्रयन्धि, युयोध्यस्मज् जुहुराणमेनः
Why do we say 'when it is not ङित्'? Observe प्रीणीहि ॥ रारन्धि is irregularly Parasmaipada of रम्; the शप् being replaced by श्लु, and the reduplicate lengthened as a Vedic form. The म्, is not elided, by 6.4.37 as the affix is not ङित् ॥ प्रयन्धि is from यम, the शप् is elided : and युयोधि from यु (यौति), the शप् being replaced by श्लु ॥,