This is the 15773rd most frequent German word.
äusseren
The German word "äußeren" means "external" or "outer" in English.
Here, 'äußere(r/s)' functions as an adjective modifying 'Erscheinungsbild' (appearance), denoting its outer or external quality.
Das äußere Erscheinungsbild des Gebäudes ist beeindruckend.
The external appearance of the building is impressive.
In this sentence, 'äußeres' refers to the outward or external aspect of oneself as opposed to the internal aspect, demonstrating contrast.
Ich konzentriere mich mehr auf mein inneres Selbst als auf mein äußeres.
I focus more on my inner self than on my outer self.
The word 'äußeren' here is used as an adjective describing 'Einflüsse' (influences), specifically those coming from outside or external sources.