Risplendi comes from the verb 'risplendere', meaning 'to shine brightly' or 'to sparkle'. It is a more evocative and poetic word than a simple 'brillare' (to shine), giving the song a grander, almost magical feel.
In the line "O Tannenbaum, O Tannenbaum, risplendi nella notte", meaning "O Tannenbaum, O Tannenbaum, shine in the night", the word asks the tree to glow like a beacon of hope. It gives the classic carol a warm, radiant image.
"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.