Juro is the first-person form of the verb jurar, meaning 'to swear' or 'to take an oath'. It's a powerful and dramatic word that instantly adds weight and sincerity to a promise.
In the lyrics, the singer declares, "Te juro ante Dios / Nunca te voy a faltar" (I swear to you before God / I will never fail you). Using juro transforms a simple promise into a solemn, unbreakable vow, showing the absolute depth of his commitment.
NSYNC took their massive pop ballad style and translated it straight into Spanish with "Yo Te Voy A Amar" (I Am Going to Love You). The whole track is an absolute vow of extreme devotion. Right away, the lyrics step up to promise emotional rescue: "Cuando sientas tristeza / Que no puedas calmar" (When you feel sadness / That you can't calm) and "Te abrazaré / Te haré olvidar / Lo que te hizo sufrir" (I will hold you / I will make you forget / What made you suffer). The drama is dialled right to the top, especially when they swear on it with "Te juro ante Dios" (I swear to God) and promise that "Tu corazón / No volverá a llorar" (Your heart / Will not cry again).
The chorus brings in a classic metaphor about warmth and safety: "Si siente un frío tu corazón / Seré tu abrigo" (If your heart feels a chill / I will be your coat). Calling oneself an "abrigo" literally means an overcoat or warm layer, making it an offer of pure shelter against pain. The track pushes this romantic dedication to its physical limit with the repeating promise "Hasta ya no respirar / Yo te voy a amar" (Until I no longer breathe / I am going to love you). It is classic boyband intensity: grand, protective, and completely all-in.