Declension table of ?tarkṣya

Masculine	Singular	Dual	Plural
Nominative	tarkṣyaḥ	tarkṣyau	tarkṣyāḥ
Vocative	tarkṣya	tarkṣyau	tarkṣyāḥ
Accusative	tarkṣyam	tarkṣyau	tarkṣyān
Instrumental	tarkṣyeṇa	tarkṣyābhyām	tarkṣyaiḥ tarkṣyebhiḥ
Dative	tarkṣyāya	tarkṣyābhyām	tarkṣyebhyaḥ
Ablative	tarkṣyāt	tarkṣyābhyām	tarkṣyebhyaḥ
Genitive	tarkṣyasya	tarkṣyayoḥ	tarkṣyāṇām
Locative	tarkṣye	tarkṣyayoḥ	tarkṣyeṣu

Compound tarkṣya -

Adverb -tarkṣyam -tarkṣyāt