Huesos literally translates to "bones". While a common word, its use in this song is a powerful and dramatic metaphor for absolute devotion.
Shakira sings, "Yo te doy hasta mis huesos" (I give you even my bones), to show she's willing to give her lover everything she has to make them stay. This visceral and hyperbolic statement is an unforgettable way to express all-consuming love, making it a fantastic word to learn.
Colombian pop star Shakira does not hold anything back in "Tú", turning total romantic surrender into a literal inventory of her possessions and body parts. She offers up everything from her waist to "las pocas neuronas que quedan ya" ("the few neurons that are left already") and even her faded sneakers ("zapatos desteñidos"). Most love songs stick to vague promises of eternal devotion, but Shakira hands over her diary, her sighs, her nose ("mi nariz"), and her actual bones ("mis huesos" just so this person will stick around. It is intense, slightly unhinged, and totally charming.
The real punch arrives when she admits how completely dependent she is on her partner. She calls them "la potencia de mi voz" ("the power of my voice") and "los pies con que camino" ("the feet I walk with"), which explains why she gets so desperate at the thought of them leaving. In fact, she flatly threatens to lock the exits if they ever try to walk away again: "Cerraría cada puerta para que nunca pudieras salir" ("I would close every door so that you could never leave"). She is not trying to play it cool. She simply cannot imagine life without them, and she will trade every last brain cell she has left to prove it.