Name #778 of 1000 · Viṣṇu Sahasranāma
दुर्गमःdurgamaḥ
Durgama
Reached only with great effort
From shloka 83 · chapter Kṛṣṇa
समावर्तोऽनिवृत्तात्मा दुर्जयो दुरतिक्रमः ।
दुर्लभो दुर्गमो दुर्गो दुरावासो दुरारिहा ॥
samāvarto'nivṛttātmā durjayo duratikramaḥ
durlabho durgamo durgo durāvāso durārihā
Also in this shloka: samāvartaḥ · anivṛttātmā · durjayaḥ · duratikramaḥ · durlabhaḥ · durgaḥ · durāvāsaḥ · durārihā