der Mieter
tenant
A person who uses an apartment, a house, or business premises from an owner in exchange for regular payment (rent).
Der neue Mieter zieht am ersten des Monats ein.
The new tenant is moving in on the first of the month.

tenant
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tenant
A person who uses an apartment, a house, or business premises from an owner in exchange for regular payment (rent).
Der neue Mieter zieht am ersten des Monats ein.
The new tenant is moving in on the first of the month.

'Der Mieter' (the tenant) comes directly from the verb 'mieten' (to rent). The ending '-er' refers to the person who performs the action. A Mieter is therefore the person who rents something.
Wer eine Wohnung mietet, wird zum Mieter.
Anyone who rents an apartment becomes a tenant.
In connection with 'Mieter' (tenant), the verbs 'einziehen' (to move into the apartment in order to live there) and 'ausziehen' (to move out of the apartment) are often used.
Der Vormieter ist gestern ausgezogen.
The previous tenant moved out yesterday.
The word 'Mieter' (tenant) always describes one party in a rental relationship. The tenant pays rent to the owner or manager of the property.
Alle Mieter des Hauses müssen sich an die Hausordnung halten.
All tenants in the building must follow the house rules.
resident
'der Bewohner' and 'der Mieter' can refer to the same person, for example someone who lives in an apartment. The difference is the perspective. 'Bewohner' only says that the person lives there. It does not matter whether they own the apartment, rent it, or live there for free. 'Mieter' says more specifically that the person pays rent for the apartment or rooms and has a rental agreement. Learners may confuse the words because many residents are also tenants. When the living situation is what matters, 'Bewohner' fits. When it is about a contract, rent, or a landlord, 'Mieter' is more precise.

Der Mieter überweist die Miete jeden Monat pünktlich.
The tenant transfers the rent on time every month.
Alle Bewohner des Hauses sollen den neuen Schlüssel bis Freitag abholen.
All residents of the building should pick up the new key by Friday.