Was heißt »hapern« auf Englisch?

Das Verb hapern lässt sich wie folgt von Deutsch auf Englisch übersetzen:

Deutsch/Englische Beispielübersetzungen

Wenn du den Motor laufen lässt, könntest du vielleicht hören, woran es hapert.: If you let the engine run, you might be able to hear what the problem is.; If you keep the engine running, you might be able to hear what's up with it.
Bei Tom hapert es gewaltig an Einfühlungsvermögen.: Tom is sorely lacking in empathy.
Woran hapert es denn noch?: What's the problem?
Tom und Maria sprechen zwar dieselbe Sprache; trotzdem scheint es bei der Kommunikation zu hapern.: Tom and Mary speak the same language, but they don't seem to communicate very well.

I lack imagination.
They discussed Tom's skills, or lack thereof.
1.3 billion people around the world lack access to electricity.
We don't lack self-confidence.
For lack of evidence proving him guilty, the jury had no choice but to acquit Tom.
Many a bargain is missed for lack of money.
Due to the lack of students, the school will be closed at the end of the year.
These claims lack a scientific foundation.
Tom was acquitted for lack of evidence.
Tom died from lack of oxygen.
The team had to forfeit the match due to lack of players.
Everyone should endeavor at his business. Then the city will lack nothing.
The hallmark of a sociopath is a lack of empathy.
Many plants withered due to lack of water.
He failed the exam because of a lack of preparation.
Tom was acquitted because of lack of evidence.
Above all, there's a lack of flats.
All human offenses are the result of a lack of love.
I just lack interest in my job.
The WHO says tobacco use, the harmful use of alcohol, unhealthy diets and lack of physical activity are some of the top reasons for premature death.