Declension table of āvaśyaka

Masculine	Singular	Dual	Plural
Nominative	āvaśyakaḥ	āvaśyakau	āvaśyakāḥ
Vocative	āvaśyaka	āvaśyakau	āvaśyakāḥ
Accusative	āvaśyakam	āvaśyakau	āvaśyakān
Instrumental	āvaśyakena	āvaśyakābhyām	āvaśyakaiḥ āvaśyakebhiḥ
Dative	āvaśyakāya	āvaśyakābhyām	āvaśyakebhyaḥ
Ablative	āvaśyakāt	āvaśyakābhyām	āvaśyakebhyaḥ
Genitive	āvaśyakasya	āvaśyakayoḥ	āvaśyakānām
Locative	āvaśyake	āvaśyakayoḥ	āvaśyakeṣu

Compound āvaśyaka -

Adverb -āvaśyakam -āvaśyakāt