sudden in English:

He made an abrupt departure.

Sorry, I didn’t mean to be so abrupt. I wouldn't have spoken so abruptly if I'd realized you were ill.

She looked puzzled at the abrupt question posed by a reporter.

There is a fine line between speech that is terse and to the point and speech that is too abrupt.

... adopted it, dropt my abrupt contradiction and positive argumentation,...

The policeman was rather abrupt with me.

Bill's abrupt manner causes him to be misunderstood.

I was amazed at his abrupt resignation.

There are often periods of seemingly little progress followed by abrupt breakthroughs of improved ability.

abrupt geographical shifts

These decision are very abrupt.

When ending a telephone conversation, the trick is not to seem too abrupt.

The sales clerks were abrupt and impatient with the customers.

There was an abrupt ​change in her ​mood.

I was charmed with it, adopted it, dropped my abrupt contradiction and positive argumentation, and put on the humble inquirer and doubter.