Declension table of ?tīkṣṇārcis

Neuter	Singular	Dual	Plural
Nominative	tīkṣṇārciḥ	tīkṣṇārciṣī	tīkṣṇārcīṃṣi
Vocative	tīkṣṇārciḥ	tīkṣṇārciṣī	tīkṣṇārcīṃṣi
Accusative	tīkṣṇārciḥ	tīkṣṇārciṣī	tīkṣṇārcīṃṣi
Instrumental	tīkṣṇārciṣā	tīkṣṇārcirbhyām	tīkṣṇārcirbhiḥ
Dative	tīkṣṇārciṣe	tīkṣṇārcirbhyām	tīkṣṇārcirbhyaḥ
Ablative	tīkṣṇārciṣaḥ	tīkṣṇārcirbhyām	tīkṣṇārcirbhyaḥ
Genitive	tīkṣṇārciṣaḥ	tīkṣṇārciṣoḥ	tīkṣṇārciṣām
Locative	tīkṣṇārciṣi	tīkṣṇārciṣoḥ	tīkṣṇārciḥṣu

Compound tīkṣṇārcis -

Adverb -tīkṣṇārcis