Cala comes from the verb calar, which has several meanings, but in this context, it means "to sting" or "to hurt deeply". It's a more evocative and less common way to express pain than simply saying duele.
In the song, the artist sings, "Otro mes que me cala escuchar que te nombren" (Another month that it stings me to hear your name mentioned). This word perfectly captures the sharp, lingering pain the singer feels every time his lost love is brought up, making it a powerful and memorable choice.
Banda MS's "Otra" is a relatable song about that feeling when you just can't get over someone. The singer is stuck in a loop of missing their ex, and it's pretty clear from the lyrics that they're not doing so great. They sing about "Otra noche más que no estás aquí" [Another night you're not here] and "Otro día preguntándome por qué te perdí" [Another day asking myself why I lost you]. It's all about the 'another' – another Friday without going out, another empty beer, another failed attempt to forget.
It's a really honest look at heartbreak. The singer is trying to move on, even saying "Otra piel que acaricio buscando tu olvido" [Another skin I caress looking for your oblivion], but it's not working. They're smoking cigarettes out of anxiety, not sleeping, and feeling a "desorden" [disorder] in their chest. When they call, the ex doesn't answer, and the singer warns, "Si de amor por tu culpa me muero, no te asombres" [If I die of love because of you, don't be surprised]. It's a powerful and a bit dramatic way to say just how much this breakup is affecting them!