to influence
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to influence
To have an effect on someone or something and thereby steer a development, behavior, or opinion in a certain direction.
Lass dich bei deiner Entscheidung nicht von anderen beeinflussen.
Don't let others influence you in your decision.
'Beeinflussen' (to influence) is derived from the noun 'der Einfluss' (influence). The prefix 'be-' turns it into a verb that is not separable. The prefix therefore always remains attached to the stem.
Der gute Lehrer hatte einen großen Einfluss auf seine Schüler.
The good teacher had a great influence on his students.
This verb is transitive and always requires a direct object in the accusative. No preposition is used.
Das Wetter beeinflusst meine Laune.
The weather influences my mood.
'Beeinflussen' (to influence) is often combined with adverbs such as 'stark' (strongly), 'positiv' (positively), or 'negativ' (negatively). Common objects are 'die Entscheidung' (the decision), 'das Ergebnis' (the result), or 'die Entwicklung' (the development).
Seine Rede hat die öffentliche Meinung stark beeinflusst.
His speech strongly influenced public opinion.
The reflexive construction 'sich beeinflussen lassen' (to let oneself be influenced) is very common. It means that you allow others to have an effect on you.
Er lässt sich leicht von der Meinung anderer beeinflussen.
He is easily influenced by other people's opinions.
influence
'der Einfluss' and 'beeinflussen' are closely related, but they have different grammatical roles. 'Einfluss' is a noun and names the effect or power that someone or something has. 'beeinflussen' is a verb and describes the action or process: someone or something affects a person, an opinion, or a development. Learners can easily confuse them because the meaning is very similar. You say 'Einfluss auf etwas haben' (to have influence on something) or 'Einfluss auf etwas nehmen' (to exert influence on something), but 'jemanden oder etwas beeinflussen' (to influence someone or something) without 'auf'.
Das Gespräch mit der Ärztin beeinflusst seine Entscheidung für die Behandlung.
The conversation with the doctor influences his decision about the treatment.
Der Einfluss des Wetters auf die Veranstaltung ist größer, als wir gedacht haben.
The influence of the weather on the event is greater than we thought.