Risplendi comes from the verb risplendere, meaning 'to shine brightly' or 'to sparkle'. It's a more evocative and poetic word than a simple 'brillare' (to shine).
In
"O Tannenbaum" is the classic German Christmas carol about a fir tree that stays green through every season. Andrea Bocelli sings it here in three languages: German, English, and Italian.
The song admires the tree's steady, faithful nature. Even in winter, when snow covers everything else, its branches stay green, a quiet symbol of hope that returns every Christmas.
In the Italian passage, the tree's light becomes a stand-in for the light of Christmas itself, tying the carol to faith and the warmth of the holiday.