
täglich
daily
Taking place, repeating, or being available every day.
Er geht täglich eine Stunde mit seinem Hund spazieren.
He walks his dog for an hour daily.
daily
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daily
Taking place, repeating, or being available every day.
Er geht täglich eine Stunde mit seinem Hund spazieren.
He walks his dog for an hour daily.

everyday
Relating to daily life; everyday, ordinary.
Das Kochen gehört zu meinen täglichen Aufgaben.
Cooking is one of my daily tasks.
The word 'täglich' (daily) is derived from the noun 'der Tag' (day) with the ending '-lich' (-ly/-ly-like). This structure is also found in other time expressions like 'wöchentlich' (weekly, from Woche), 'monatlich' (monthly, from Monat), and 'jährlich' (yearly, from Jahr).
Diese Zeitschrift erscheint wöchentlich.
This magazine is published weekly.
'Täglich' (daily) can stand before a noun as an adjective and is then declined. It can also be used as an adverb to describe a verb, and then it remains unchanged.
Die tägliche Dosis Nachrichten kann anstrengend sein.
The daily dose of news can be exhausting.
In the meaning 'alltäglich' (everyday), 'täglich' is often combined with nouns that describe routine or life. Common examples are 'das tägliche Leben' (daily/everyday life), 'die tägliche Routine' (daily routine), or 'tägliche Aufgaben' (daily tasks).
Das sind die kleinen Freuden des täglichen Lebens.
These are the small joys of everyday life.
everyday
Täglich indicates that something happens every day. Alltäglich, by contrast, describes something as normal, ordinary, or unsurprising. So, for a routine, täglich refers to the frequency, while alltäglich refers to the familiar or possibly boring effect.

Mara fährt täglich mit dem Bus zur Arbeit.
Mara takes the bus to work every day.
Die Fahrt mit dem Bus zur Arbeit ist für Mara längst alltäglich.
For Mara, taking the bus to work has long been an everyday routine.