Traicionera is a powerful adjective meaning 'treacherous' or a noun for a female 'betrayer'. It's a classic word in dramatic Latin music, packed with emotion and accusation.
In this bachata anthem, Raulin Rodriguez saves this word for a spoken-word outro. He calls the woman who broke his heart a "mujer cobarde y traicionera" (a cowardly and treacherous woman), pouring out all his pain and bitterness in a climactic moment.
Talk about drama! In this classic bachata track, Raulin Rodriguez is suffering from a very serious illness: a 'cáncer de amor' (cancer of love). It's a bit over the top, but that's the point! He is completely convinced that only one woman has the cure, the 'Medicina de amor' (medicine of love) that can save him from his lovesickness. He feels like he's wasting away, singing 'Muriendo voy' (I'm dying) as another year passes without her.
He seems to know it's his own fault, admitting 'Que tan mal me porté' (I behaved so badly). But just when you might feel sorry for him, he breaks into a spoken dedication. He calls out the woman who has 'destroyed' his soul, labeling her a 'mujer cobarde y traicionera' (cowardly and treacherous woman). It's a sudden, bitter twist that takes the song from a desperate plea to a direct accusation.