Names #382, #544 · Viṣṇu Sahasranāma
गहनःgahanaḥ
Gahana — appears 2 times in the stotram, each with its own meaning
Name #382
The deep, impenetrable mystery
From shloka 41 · chapter Narasiṃha
उद्भवः क्षोभणो देवः श्रीगर्भः परमेश्वरः ।
करणं कारणं कर्ता विकर्ता गहनो गुहः ॥
udbhavaḥ kṣobhaṇo devaḥ śrīgarbhaḥ parameśvaraḥ
karaṇaṃ kāraṇaṃ kartā vikartā gahano guhaḥ
Also in this shloka: udbhavaḥ · kṣobhaṇaḥ · devaḥ · śrīgarbhaḥ · parameśvaraḥ · karaṇam · kāraṇam · kartā · vikartā · guhaḥ
Name #544
The impenetrable depth
From shloka 58 · chapter Paraśurāma
महावराहो गोविन्दः सुषेणः कनकाङ्गदी ।
गुह्यो गभीरो गहनो गुप्तश्चक्रगदाधरः ॥
mahāvarāho govindaḥ suṣeṇaḥ kanakāṅgadī
guhyo gabhīro gahano guptaścakragadādharaḥ
Also in this shloka: mahāvarāhaḥ · govindaḥ · suṣeṇaḥ · kanakāṅgadī · guhyaḥ · gabhīraḥ · guptaḥ · cakragadādharaḥ