
der Geruch
smell
The perception taken in through the nose from scents in the air; a fragrance or stench.
Ich liebe den Geruch von frisch gemähtem Gras im Sommer.
I love the smell of freshly cut grass in summer.
smell
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smell
The perception taken in through the nose from scents in the air; a fragrance or stench.
Ich liebe den Geruch von frisch gemähtem Gras im Sommer.
I love the smell of freshly cut grass in summer.

to be suspected
In a figurative sense, the reputation or suspicion of having a certain, often negative, quality or of having done something.
Das Unternehmen steht im Geruch, seine Mitarbeiter schlecht zu bezahlen.
The company is suspected of paying its employees poorly.
'Der Geruch' (the smell) is the noun derived from the verb 'riechen' (to smell). This connection helps you understand the meaning: 'riechen' is the action, and 'der Geruch' is what one perceives.
Ich rieche einen seltsamen Geruch in der Küche.
I smell a strange odor in the kitchen.
'Geruch' (smell) itself is neutral. Whether the smell is good or bad is determined by an adjective, e.g. 'ein guter/angenehmer Geruch' (a good/pleasant smell) or 'ein schlechter/unangenehmer Geruch' (a bad/unpleasant smell).
Der angenehme Geruch von Lavendel beruhigt mich.
The pleasant smell of lavender calms me.
To describe what something smells like, German uses the preposition 'von' followed by the dative. The structure is: 'der Geruch von etwas' (the smell of something).
Ich mag den Geruch von frisch gebackenem Brot.
I like the smell of freshly baked bread.
The idiom 'im Geruch stehen, etwas zu tun' means that someone has a bad reputation or is suspected of having done something negative. The expression always has a negative connotation.
Der Politiker steht im Geruch der Korruption.
The politician is suspected of corruption.
reputation / call
Both words can express that someone is publicly associated with a particular quality. “Der Ruf” is a general evaluation and can be positive or negative, whereas “im Geruch stehen” is usually used in a set expression to express a negative assumption or suspicion. Use the expression when there is such a suspicion.

Der Politiker steht im Geruch, seine Versprechen nicht einzuhalten.
The politician is suspected of not keeping his promises.
Die Ärztin hat in der Stadt einen guten Ruf als sorgfältige Fachfrau.
The doctor has a good reputation in the city as a careful professional.