Declension table of ?āpastambha

Masculine	Singular	Dual	Plural
Nominative	āpastambhaḥ	āpastambhau	āpastambhāḥ
Vocative	āpastambha	āpastambhau	āpastambhāḥ
Accusative	āpastambham	āpastambhau	āpastambhān
Instrumental	āpastambhena	āpastambhābhyām	āpastambhaiḥ āpastambhebhiḥ
Dative	āpastambhāya	āpastambhābhyām	āpastambhebhyaḥ
Ablative	āpastambhāt	āpastambhābhyām	āpastambhebhyaḥ
Genitive	āpastambhasya	āpastambhayoḥ	āpastambhānām
Locative	āpastambhe	āpastambhayoḥ	āpastambheṣu

Compound āpastambha -

Adverb -āpastambham -āpastambhāt