Declension table of ?gardhayitavya

Neuter	Singular	Dual	Plural
Nominative	gardhayitavyam	gardhayitavye	gardhayitavyāni
Vocative	gardhayitavya	gardhayitavye	gardhayitavyāni
Accusative	gardhayitavyam	gardhayitavye	gardhayitavyāni
Instrumental	gardhayitavyena	gardhayitavyābhyām	gardhayitavyaiḥ
Dative	gardhayitavyāya	gardhayitavyābhyām	gardhayitavyebhyaḥ
Ablative	gardhayitavyāt	gardhayitavyābhyām	gardhayitavyebhyaḥ
Genitive	gardhayitavyasya	gardhayitavyayoḥ	gardhayitavyānām
Locative	gardhayitavye	gardhayitavyayoḥ	gardhayitavyeṣu

Compound gardhayitavya -

Adverb -gardhayitavyam -gardhayitavyāt