Of course tango is also a modern word, but in Latin it literally means "I touch". Which fits the nature of the dance pretty much, even if many tangueros will insist that the touch they mean is a spiritual thing. Ha!
"Would you like to learn to tango? Do you dance the light fandango? Teach you how before we're done Anyone can make it two Any two can turn to one And the melody's lost before the song's begun Well we sound so good together And so poorly sung alone Your harmony's an open breeze into my sheltered home I can teach you how to sing and dance With a song and dance routine And when the party's over You can fall in love with me"