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76. How are the affixes of the oblique cases added to
the crude-form?*
Some nouns (and in particular all plurals) add them
to the nominatives.
Ex: Ráman, Rámanál (= by Ráman); gurukkaḷ (= preceptors),
gurukkaḷute (= of preceptors).
Some however have a crude-form which is peculiar to
the oblique cases; this is called the substituted-form,
and it is to this that they affix their case-endings.
77. What is this substituted-form?
Nouns whose nominative singular ends in 'am' and
some other nouns add 'ttŭ' to the crude-form.
Ex: The substituted-form of 'maram' is 'mara+ttŭ = marattŭ'.
* The nominative (of which the vocative is only another form)
is the Casus Rectus (= upright case), all other cases are classed
together as oblique cases thus:
Nominative. . . . . . . . Ex: Ráman
Accusative. . . . . . . Ráman
Instrumental. . . . . by or with Ráman
Dative . . . . . to or for Ráman
Ablative. . . . from Ráman
Geniitive . . Ráman's, of Ráman
Locative. in Ráman
