das Arbeitszimmer
study
A room in an apartment or house that is used for working, studying, or office tasks.
Wegen des Homeoffice habe ich mir ein neues Arbeitszimmer eingerichtet.
Because of working from home, I set up a new study for myself.

study
Loading your saved state.
study
A room in an apartment or house that is used for working, studying, or office tasks.
Wegen des Homeoffice habe ich mir ein neues Arbeitszimmer eingerichtet.
Because of working from home, I set up a new study for myself.

'Arbeitszimmer' (study) is a compound noun made from 'die Arbeit' (work) and 'das Zimmer' (room). The linking 's' connects the two parts. So it is literally a 'room for work'.
Mein Arbeitszimmer ist leider sehr klein.
Unfortunately, my study is very small.
Pay attention to the prepositions: you work 'im Arbeitszimmer' (in the study; dative, location), but you go 'ins Arbeitszimmer' (into the study; accusative, direction).
Er geht jetzt ins Arbeitszimmer, um seine E-Mails zu lesen.
He is going into the study now to read his emails.
Common verbs used with 'Arbeitszimmer' (study) are 'einrichten' (to set up), 'nutzen' (to use), and 'sich zurückziehen' (to withdraw/retreat).
Er zieht sich oft ins Arbeitszimmer zurück, um in Ruhe lesen zu können.
He often retreats to the study so he can read in peace.
office / bureau
'das Büro' and 'das Arbeitszimmer' can both refer to a room where you work at a desk. 'Büro' sounds more like a workplace in a company or organization. But it can also be used at home, especially if you work professionally there. 'Arbeitszimmer' usually means a room in an apartment or house where you work, study, or read. Learners may confuse the words because both describe a room for working. As a simple guide: in a company, people usually say 'Büro'; at home, they often say 'Arbeitszimmer'.

Am Morgen ist das Arbeitszimmer der ruhigste Ort im Haus.
In the morning, the study is the quietest place in the house.
Wir haben das Büro für die neue Kollegin vorbereitet.
We prepared the office for the new colleague.