इति रामायणे ।सर्वविद्योपदेशेन वा सुमुखः, 'यो ब्रह्माणम्' इत्यादिश्रुतेः ।शब्दादिस्थूलकारणरहितत्वात्—शब्दादयो ह्याकाशादीनामुत्तरोत्तरस्थूलत्वकारणानि, तदभावात्—सूक्ष्मः, 'सर्वगतं सुसूक्ष्मम्' इति श्रुतेः ।शोभनो घोषो वेदात्मकोऽस्येति, मेघगम्भीरघोषत्वाद्वा सुघोषः ।सद्वृत्तानां सुखं ददाति,
In plain words
Thus it is stated in the Ramayana. He is Sumukha because He imparts all sacred wisdom, as scripture declares in the passage beginning with 'Who first created Brahma...' He is Sūkṣma because He is completely free from the gross material causes such as sound and the progressive densities of ether, as scripture affirms: 'All-pervading and supremely subtle.' He is Sughoṣa because His utterance is the Vedas themselves, or because His voice resonates with the deep majesty of thunderclouds. And He is Sukhada because He bestows happiness upon the virtuous.
Close to the Sanskrit
Thus in the Ramayana. Or Sumukha because He imparts all spiritual knowledge, from the Vedic text starting with 'Who created Brahma...'. Sūkṣma is so named because He is devoid of gross causes such as sound and the subsequent denser material grounds like ether, from the scripture 'All-pervading and supremely subtle'. Sughoṣa is He whose sound consists of the Vedas, or because His voice is deep like a thundercloud. Sukhada is He who gives happiness to those of virtuous conduct.