Declension table of ?kleśana

Neuter	Singular	Dual	Plural
Nominative	kleśanam	kleśane	kleśanāni
Vocative	kleśana	kleśane	kleśanāni
Accusative	kleśanam	kleśane	kleśanāni
Instrumental	kleśanena	kleśanābhyām	kleśanaiḥ
Dative	kleśanāya	kleśanābhyām	kleśanebhyaḥ
Ablative	kleśanāt	kleśanābhyām	kleśanebhyaḥ
Genitive	kleśanasya	kleśanayoḥ	kleśanānām
Locative	kleśane	kleśanayoḥ	kleśaneṣu

Compound kleśana -

Adverb -kleśanam -kleśanāt