Duśśāsana = “difficult to rule over”
Duryodhana = “difficult to fight against”
Durdarśana = “difficult to behold”
Durdharshaṇa = “difficult to assault”
Durmarṣaṇa = “difficult to bear [in battle]”
All have positive meanings, contrary to what @itsanandneel claims for Duśśāsana and Duryodhana
Durmarṣaṇa is not just the name of a son of Dhṛtarāṣṭra, it is also a name of Viṣṇu in Viṣṇu-sahasranāma of Mahābhārata
‘Vigraha’s are in attached image
‘duḥkhena’ in ‘vigraha’ is from “īṣadduḥsuṣu kṛcchrākṛcchrārtheṣu khal” (A 3.3.126, “kṛcchraṃ duḥkham”)