And the compound called dvigu (Numeral Determinative Compound) is all called tat-puruṣa ,
The object of making Dwigu a sub-division of Tat-purusha Compound is that the समासान्त affixes and rules given in (V. 4. 68-160) should apply to Dwigu also. Otherwise we could well have dispensed with this sutra; as sútra 52 of this chapter already defines Dwigu. Thus पञ्चराज्ञ 5.4.91 fem. पञ्चराज्ञी (IV. I. 15., 21), 'an aggregate of 5 princes' द्ववहः, '5.4.89, पञ्चगवम् 'an aggregate of 5 cows.' दशगवम् 'an aggregate of ten cows.' (V. 4. 92.),