Salvaje translates to "wild" or "savage." While it can describe animals or untamed nature, in this song, it's used to describe a "deseo salvaje" (wild desire).
This word is interesting because it intensifies the emotion, suggesting a powerful, untamed longing that is difficult to control. It's a strong, evocative adjective that makes the desire feel primal and overwhelming, perfectly setting the tone for the song's theme of intense yearning.
A salsa romántica lament from a man who still wants the woman who left him years ago. The "Deseo salvaje" (Wild desire) of the title is very specific: "De sentir en mis brazos / La mujer que hace años / Se robo mi querer" (To feel in my arms / The woman who years ago / Stole my love). Since then he says he spends his days "Con un dolor amargo" (With a bitter pain), and he names it plainly: "La soledad" (Loneliness).
The song works through two forces pulling against each other. Desire "aumenta mis ansias" (increases my longings) and makes him "Perder la razón" (Lose my mind), while loneliness "día a día destruye / Mi corazón" (day by day destroys / My heart). The closing lines shift from feeling her in his arms to wanting "De obtener / Tu amor" (To win / Your love). Nino Segarra sings it as the opening half of a tribute to Lalo Rodríguez, so it runs straight into "Desilusión" on this recording. The short lines make it a good song for the verbs sentir, robar and destruir.