relave
tailings
re-
again
+
lavar
to wash
Relave means tailings (mining waste) and can be thought of as re-0 (again0) + lavar1 (to wash1), referring to the process of rewashing ore to extract remaining minerals.
noun
- tailingsWaste material left after extracting ore from mining operationsEl relave de la mina debe ser tratado adecuadamente para evitar la contaminación. // The mine tailings must be properly treated to avoid contamination.