Cicatriza comes from the verb cicatrizar, meaning "to heal" or "to scar over." It's a vivid and somewhat less common word in everyday conversation, making it stand out in lyrics.
In the song, Diomedes Diaz sings, "La herida que siempre llevo en el alma no cicatriza" (The wound I always carry in my soul does not heal). He uses this word to powerfully convey the enduring pain of a heartbreak that simply won't mend, emphasizing the depth of his emotional suffering.
"Sin Medir Distancias" opens on a wound that never closes — "La herida que siempre llevo en el alma no cicatriza" ("The wound I always carry in my soul doesn't heal") — and Diomedes Díaz spends the first half wanting out: somewhere with no betrayal, no lies, just to "vivir tranquilo" ("live peacefully"). Jorge Celedón's verses turn that longing into something closer to faith: fill the soul with eternity and the ache stops mattering, "Si lleno, si lleno el alma de eternidad" ("If I fill, if I fill my soul with eternity"), repeated like he's convincing himself as much as anyone else.
By the second half the decision is made. "Llego la hora de partir sin medir distancias" ("The time has come to leave without measuring distances") gives the song its title, and it isn't a dramatic exit — friends notice something's off before he says a word, asking "Qué es lo que pasa en tu interior" ("What's going on inside you?"). He answers the only way the song knows how, returning one last time to the line it keeps circling back to: no shadow of that love is going to be left behind.