If a noun ends with a vowel sound then they are called vowel nouns. As we have studied in the earlier portion of the course about the vowels, this might easy to understand. As we know there are 4 basic vowels in Sanskrit, aa, ee, uuh, ruh. Now it’s time to see how the vowel in noun changes.

First, let us see i vowel noun

-i (masculine/feminine)

अग्नि Singular Dual Plural
Case 1
(Subject)
अग्निः
agniḥ
- अग्नयः
agnayaḥ
Case 2
(object)
अग्निम्
agnim
- अग्नीन्
agnīn
Case 3
(with)
- - अग्निभिः
agnibhiḥ

Case 6
(of)
- - अग्नीनाम्
agnīnām

As you can see here that how the vowel changes according to the form and number of persons.

Now let us see u vowel

-u (masculine/feminine)

गुरु Singular Dual Plural
Case 1
(Subject)
गुरुः
guruḥ

- गुरवः
guravaḥ

Case 2
(object)
गुरुम्
gurum
- गुरून्
gurūn
Case 3
(with)
- - गुरुभिः
gurubhiḥ

Case 6
(of)
- - गुरूणाम्
gurūṇām

One thing you should’ve noticed that case 1 plural of masculine is a strengthened one; such words are seen in Bhagavad-Gita too:

धर्मक्षेत्रे कुरुक्षेत्रे समवेता युयुत्सवः
dharmakṣetre kurukṣetre samavetā yuyutsavaḥ
On dharma’s field, the field of Kurus, all assembled wanting war …

Previous nouns were both masculine and feminine in nature; now let us see the nouns that are specifically feminine in nature. They are ā , ī , and ū nouns.

ā (feminine)

विद्या Singular Dual Plural
Case 1
(Subject)
विद्या
vidyā


- विद्याः
vidyāḥ


Case 2
(object)
विद्याम्
vidyām
- विद्याः
vidyāḥ

Case 3
(with)
- - विद्याभिः
vidyābhiḥ

Case 6
(of)
- - विद्यानाम्
vidyānām

ī (feminine)

वापी Singular Dual Plural
Case 1
(Subject)
वापी
vāpī



- वाप्यः
vāpyaḥ


Case 2
(object)
वापीम्
vāpīm

- वापीः
vāpīḥ


Case 3
(with)
- - वापीभिः
vāpībhiḥ



Case 6
(of)
- - वापीनाम्
vāpīnām

ū (feminine)

चमू Singular Dual Plural
Case 1
(Subject)
चमूः
camūḥ




- चंवः
caṃvaḥ


Case 2
(object)
चमूम्
camūm

- चमूः
camūḥ



Case 3
(with)
- - चमूभिः
camūbhiḥ




Case 6
(of)
- - चमूनाम्
camūnām

tad (feminine)

तद् Singular Dual Plural
Case 1
(Subject)
सा






- ताः
tāḥ



Case 2
(object)
ताम्
tām


- ताः
tāḥ




Case 6
(of)
- - तासाम्
tāsām


Now let us consider some primary suffixes and their gender so that you might be able to recognize them in the sentence.

suffixes gender
गम् + ति → गति
gam + ti → gati
go → path, way

स्मृ + ति → स्मृति
smṛ + ti → smṛti
Remember → remembrance, what is
Turning adjectives into feminine

We have so far learned about vowel nouns and its suffixes of both genders. Now let us try to change the gender of the following sentences. Here the adjectives have been changed by changing a ending to ā.

स प्रियः → सा प्रिया
sa priyaḥ → sā priyā
He is beloved. → She is beloved.

स सुन्दरः → सा सुन्दरी
sa sundaraḥ → sā sundarī
He is beautiful. → She is beautiful.
(Interestingly from all the adjectives that we have studied, this is the only one that uses I as a feminine)