How to Say "grunt work" in Spanish
The Spanish word for “grunt work” is “infantería” — C1 level.
English → SpanishC1
nounC1informal
tedious or manual labor

Examples
Hicimos toda la infantería de la campaña puerta a puerta.
We did all the groundwork for the campaign going door to door.
Este proyecto requiere mucho trabajo de infantería antes de lanzarlo.
This project requires a lot of grunt work before launching it.
Metaphorical use
Just like 'foot soldiers' can mean people doing the basic work in English, 'infantería' describes the people or the work at the lowest, most foundational level of a project.
Don't use it for high-level tasks
Mistake: “Using 'infantería' for creative or managerial tasks.”
Correction: Only use this when describing the 'legs' of a project—the repetitive or hard manual tasks.
Related Translations
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