uñero
ingrown nail
uña
nail
+
-ero
suffix indicating condition or state
An uñero is an ingrown nail, which can be understood as a condition1 (-ero1) affecting a nail0 (uña0).
noun
- ingrown nailAn ingrown nail, especially a toenailMe duele el dedo del pie por un uñero. // My toe hurts because of an ingrown nail.