In expressing multeity, a Plural case affix is employed.,
When it is intended to denote multeity those affixes should be employed after nouns and verbs, which denote plural number. Thus ब्राह्मणाः पठन्ति, The Brahmins read.
This rule applies to words which are capable of expressing numbers. Indeclinables (Avyaya) do not admit of numbers, and consequently they are always in singular number which is the general form.,