In plain words
Tell me again in detail of Your yoga and Vibhūti, Janardana, for I am never satisfied while hearing this nectar.
Word for word
In detail Your own yoga and vibhūti, O Janārdana, tell again; for there is no satiety for me hearing the nectar.
The commentators
Bhagavadgītābhāṣyam· bhāṣya
विस्तरेण आत्मनः योगं योगैश्वर्यशक्तिविशेषं विभूतिं च विस्तरं ध्येयपदार्थानां हे जनार्दन, अर्दतेः गतिकर्मणः रूपम् , असुराणां देवप्रतिपक्षभूतानां जनानां नरकादिगमयितृत्वात् जनार्दनः अभ्युदयनिःश्रेयसपुरुषार्थप्रयोजनं सर्वैः जनैः याच्यते इति वा । भूयः पूर्वम् उक्तमपि कथय ; तृप्तिः परितोषः हि यस्मात् नास्ति मे मम शृण्वतः त्वन्मुखनिःसृतवाक्यामृतम् ॥ १८ ॥
In plain words
Tell me in detail, O Janārdana, of your own yoga — that particular power of your sovereignty — and of your glory, the whole vast sweep of things worth contemplating. You are called Janārdana from the root 'ard,' meaning to drive or set in motion, either because you drive the demons — the very opponents of the gods — toward ruin, or because all people turn to you, begging for the true goals of life: worldly flourishing and final freedom. Tell me again, even what you have already told me — because I simply cannot get enough, listening to this nectar of words flowing straight from your mouth.
Close to the Sanskrit
In detail, of the Self, the yoga — the particular power of yogic lordship — and the manifestation, the expanse of the objects worthy of meditation, O Janārdana — from the root 'ard,' whose meaning is motion, is the form; because of causing to go to hell and the like the demons, who are the opponents of the gods, the people — hence Janārdana; or, because the purpose that is the human goals of prosperity and liberation is entreated by all people — [hence Janārdana]. Tell again even what was already said; for there is no satisfaction, contentment, of me, of me while listening, in the nectar of speech flowing out from your mouth.