to impair
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to impair
To have a negative effect on something or someone; to disrupt, hinder, or reduce the quality of something.
Der Lärm von der Baustelle beeinträchtigt meine Konzentration.
The noise from the construction site impairs my concentration.
'Beeinträchtigen' (to impair) is an inseparable verb. The prefix 'be-' remains firmly attached to the verb in all tenses and sentence positions and is never separated.
Die schlechte Luftqualität hat seine Gesundheit beeinträchtigt.
The poor air quality impaired his health.
The verb 'beeinträchtigen' (to impair) always requires an accusative object. This is the person or thing that is negatively affected. You ask: Whom or what does something impair?
Der ständige Lärm beeinträchtigt die Anwohner.
The constant noise impairs the residents.
'Beeinträchtigen' (to impair) is often used with abstract nouns that describe a quality or state. Common combinations are 'die Leistung beeinträchtigen' (to impair performance), 'die Gesundheit beeinträchtigen' (to impair health), or 'die Lebensqualität beeinträchtigen' (to impair quality of life).
Schlafmangel kann die Konzentrationsfähigkeit erheblich beeinträchtigen.
Lack of sleep can significantly impair the ability to concentrate.
The word 'beeinträchtigen' (to impair) belongs to standard language and is often used in more formal or written contexts. It often sounds somewhat elevated.
Die Baumaßnahmen werden den Verkehr voraussichtlich nicht beeinträchtigen.
The construction work is not expected to impair traffic.
to improve
'verbessern' and 'beeinträchtigen' describe opposite effects. With 'verbessern', something becomes better, stronger, or more useful. With 'beeinträchtigen', something is disrupted, hindered, or made worse. For example, you can improve health, but noise can impair health. So 'verbessern' names a positive effect, while 'beeinträchtigen' names a negative effect.
Starker Regen beeinträchtigt heute die Sicht auf der Straße.
Heavy rain is impairing visibility on the road today.
Regelmäßige Pausen verbessern meine Konzentration am Nachmittag.
Regular breaks improve my concentration in the afternoon.