die Wechselwirkung
Translation
interaction, interplay, reciprocal effect
Examples
Es gibt eine Wechselwirkung zwischen den Medikamenten.
There is an interaction between the medications.
Die Wechselwirkung von Angebot und Nachfrage ist komplex.
The interplay of supply and demand is complex.
Grammar Patterns
the interaction ((between)) the interaction between the two substances
Similar Words
Synonyms: die Interaktion (interaction), die Beziehung (relationship), der Zusammenhang (connection)
Etymology
A compound of 'Wechsel' (exchange) and 'Wirkung' (effect). Literally an 'exchange-effect'.
Memory Tips
Imagine two things 'working' (Wirkung) on each other in an 'exchange' (Wechsel).