Declension table of ?asādhyatva

Neuter	Singular	Dual	Plural
Nominative	asādhyatvam	asādhyatve	asādhyatvāni
Vocative	asādhyatva	asādhyatve	asādhyatvāni
Accusative	asādhyatvam	asādhyatve	asādhyatvāni
Instrumental	asādhyatvena	asādhyatvābhyām	asādhyatvaiḥ
Dative	asādhyatvāya	asādhyatvābhyām	asādhyatvebhyaḥ
Ablative	asādhyatvāt	asādhyatvābhyām	asādhyatvebhyaḥ
Genitive	asādhyatvasya	asādhyatvayoḥ	asādhyatvānām
Locative	asādhyatve	asādhyatvayoḥ	asādhyatveṣu

Compound asādhyatva -

Adverb -asādhyatvam -asādhyatvāt