When they begin the beguine
When the orchestra starts playing the Beguine, a music genre that originated in the Caribbean, it evokes strong memories and emotions.

It brings back the sound of music so tender
The Beguine music reminds the speaker of music that is soft and delicate.

It brings back a night of tropical splendor
The Beguine music transports the speaker back to a beautiful and exotic night full of vibrant colors and atmosphere.

It brings back a memory ever green
The Beguine music revives a memory that is always fresh and never fades away.

I'm with you once more under the stars
The Beguine music makes the speaker feel like they are with their loved ones again, experiencing a romantic moment under the stars.

And down by the shore an orchestra's playing
The speaker hears the Beguine music being played by an orchestra near the beach.

And even the palms seem to be swaying
The Beguine music is so lively that even the palms are moving to its rhythm.

To live it again is past all endeavor
The speaker feels that it is impossible to experience such a moment again.

Except when that tune clutches my heart
The speaker feels the power of the Beguine music as it touches their heart.

And there we are, swearing to love forever
The Beguine music makes the speaker and their partner feel so connected that they make a promise of eternal love.

And promising never, never to part
The speaker and their partner vow to never separate or leave each other's side.

What moments divine, what rapture serene
The speaker describes the moment as heavenly and tranquil.

Till clouds came along to disperse the joys we had tasted
The happiness of the moment is disrupted when something unfortunate happens.

And now when I hear people curse the chance that was wasted
The speaker understands when people regret not seizing an opportunity.

I know but too well what they mean
The speaker can relate to those who regret a lost chance.

So don't let them begin the beguine
The speaker asks to not play the Beguine music as it will bring back too many emotions and memories.

Let the love that was once a fire remain an ember
The speaker suggests to keep the former strong love as a small burning ember that can still be cherished.

Let it sleep like the dead desire I only remember
The speaker compares the former strong love to a dead desire that is only remembered, but not acted upon anymore.

Oh yes, let them begin the beguine, please make them play
The speaker changes their mind and asks to play the Beguine music again, wanting to relive the same romance and emotions.

Till the stars that were there before return above you
The speaker wishes to experience the same romantic moment under the stars, as before.

Till you whisper to me once more, "Darling, I love you"
The speaker wants to hear their partner express their love again, just like before.

Then we suddenly know what heaven we're in
The Beguine music creates an overwhelming sense of happiness and bliss.

When they begin the, begin the, begin the beguine
Repeating the title line, the speaker emphasizes the power of the Beguine music to bring back strong emotions and memories.