How to Say "time-consuming" in Spanish
The Spanish word for “time-consuming” is “tardado” — B1 level. This is a very common word in everyday Spanish.
English → SpanishB1
adjectiveB1
referring to a process or task

Examples
El trámite para la visa es muy tardado.
The visa process is very time-consuming.
No seas tardado, ya casi nos vamos.
Don't be so slow, we're almost leaving.
Fue un viaje tardado por la lluvia.
It was a lengthy trip because of the rain.
Gender Agreement
Remember to change the ending to 'tardada' when describing feminine words, like 'una tarea tardada' (a time-consuming task).
Tardado vs. Lento
Mistake: “Using 'lento' for everything that takes time.”
Correction: Use 'lento' for speed (a slow car) and 'tardado' for duration (a task that takes a long time).
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