How to Say "residue" in Spanish
The most common Spanish word for “residue” is “residuos” — use 'residuos' when referring to traces or remnants of a substance, particularly in scientific, forensic, or waste contexts..
English → Spanish
residuos
/rre-SEE-dwos//reˈsiðwos/
nounB2general
Use 'residuos' when referring to traces or remnants of a substance, particularly in scientific, forensic, or waste contexts.

Examples
El análisis detectó residuos de pólvora en sus manos.
The analysis detected gunpowder residue on his hands.
Al limpiar la herida, asegúrate de que no queden residuos.
When cleaning the wound, make sure no residue remains.
Technical Usage
In this context, it refers to small, often invisible traces left behind after something is used or removed.
depósito
nounB2technical
Use 'depósito' when referring to a buildup or deposit of a substance, such as mineral deposits in water or sediment at the bottom of a container.
Examples
El análisis mostró depósitos de calcio en el agua.
The analysis showed calcium deposits in the water.
Residuos vs. Depósito
Learners often confuse 'residuos' and 'depósito' by using 'depósito' for any trace left behind. Remember that 'residuos' is the go-to for chemical traces or waste, whereas 'depósito' suggests a more physical accumulation, like sediment or mineral buildup.
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