How to Say "bottleneck" in Spanish
The Spanish word for “bottleneck” is “tapón” — B1 level. This is a very common word in everyday Spanish.
English → SpanishB1
nounB1
clogged situation

Examples
Llego tarde porque hay un tapón en la autopista.
I'm late because there is a traffic jam on the highway.
Siempre se forma un tapón a esta hora.
A traffic jam always forms at this time.
Using 'Hay' with Tapón
Just like in English we say 'there is a jam,' in Spanish we use 'hay un tapón' to describe the existence of traffic.
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