How to Say "daily" in Spanish
The most common Spanish word for “daily” is “diario” — use 'diario' when referring to something that happens or is done every day, often implying a routine or a regular occurrence.
diario
dee-AH-reeodiˈa.rjo

Examples
Necesito establecer una rutina diaria para estudiar mejor.
I need to establish a daily routine to study better.
Esa tienda abre los siete días de la semana, su servicio es diario.
That store opens seven days a week, its service is daily.
Este es un problema diario para los habitantes de la ciudad.
This is an everyday problem for the inhabitants of the city.
Agreement is Key
As an adjective, 'diario' must agree with the word it describes. Use 'diario' (masculine singular), 'diaria' (feminine singular), 'diarios' (masculine plural), or 'diarias' (feminine plural).
Using the Noun as Adverb
Mistake: “Hago ejercicio diario. (I exercise daily.)”
Correction: Hago ejercicio diariamente. OR Hago ejercicio todos los días. While the adjective form is often used, the true adverb is 'diariamente'.
diariamente
dee-ah-ryah-MEN-tehdja.ɾjaˈmen.te

Examples
Bebo dos litros de agua diariamente.
I drink two liters of water daily.
Es fundamental lavarse los dientes diariamente.
It is essential to brush your teeth every day.
El sistema se actualiza diariamente a medianoche.
The system updates daily at midnight.
The '-mente' Ending
In Spanish, adding '-mente' to the end of a feminine describing word (like 'diaria') is just like adding '-ly' in English. It turns the word into an action-describer.
Where to Put It
You usually place 'diariamente' right after the action (verb) it describes, though it can also go at the very end of the sentence.
Adverb vs. Adjective
Mistake: “Leo el diariamente periódico.”
Correction: Leo el periódico diariamente OR Leo el periódico diario. Use 'diariamente' to describe HOW you read, but 'diario' to describe the newspaper itself.
cotidiano
ko-tee-dee-ah-nokotiˈðjano

Examples
Me gusta mi rutina cotidiana.
I like my daily routine.
La vida cotidiana en esta ciudad es muy tranquila.
Everyday life in this city is very quiet.
Debemos resolver los problemas cotidianos con paciencia.
We must solve everyday problems with patience.
Matching the Gender
This word must match the noun it describes. Use 'cotidiano' for masculine words (el ritmo cotidiano) and 'cotidiana' for feminine words (la vida cotidiana).
Word Order
In Spanish, this word almost always comes after the thing you are describing. Say 'problemas cotidianos' rather than 'cotidiano problemas'.
Confusing 'diario' and 'cotidiano'
Mistake: “El periódico cotidiano.”
Correction: El periódico diario.
Adjective vs. Adverb Confusion
Related Translations
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