A case-inflected words pūrva 'prior', apara 'other', prathama 'first', carama 'last', jaghanya 'hindmost', samāna 'equal', madhya 'middle', madhyama 'middle', and vīra 'hero' are compounded with words ending with a case-affix and which are in agreement (same case) with them and the resulting compound is tat-puruṣa ,
As पूर्व पुरुषः 'ancestor,' (any one of the three, father, grandfather and great-grandfather), अपरपुरुषः 'successor,' चरमपुरुषः 'last person,' जघन्यपुरुषः 'hinder most person,' समानपुरुषः.' equal person,'मध्य or मध्यमपुरुषः 'middle person,'वीरपुरुषः 'heroic person.',