The phrase "abruptly terminate" is correct and usable in written English.
It can be used when describing the sudden ending of an event, process, or action without warning.
Example: "The meeting was going well until the manager decided to abruptly terminate the discussion."
Alternatives: "suddenly end" or "quickly conclude".
A reactor's plasma occasionally will spontaneously reconfigure the prescribed magnetic field, inducing instabilities that may abruptly terminate the experiment.
In some circumstances, paroxysmal supraventricular tachycardia will abruptly terminate, and the sinoatrial node will not take up normal sinus rhythm.
A third category has a so-called "nonsense mutation," which causes the cell to abruptly terminate production of the protein, making only a fragment.
He went on to complain how difficult it was to convince researchers to abruptly terminate projects they had been conducting for years.
To abruptly terminate this lawsuit that has proceeded through lengthy and, no doubt, costly discovery stages for a year would surely be inimical to the beneficent purpose of the Congress.
Just when the novelty of the Argentine dalliance of Gov. Mark Sanford of South Carolina had begun to fade, Gov. Sarah Palin of Alaska enlivened a ho-hum Fourth of July with her announcement that she would abruptly terminate her first term and instead seek to "effect positive change outside government".
He abruptly terminated the call.
The island was forgotten, they say, because its function was so abruptly terminated.
His composing career was abruptly terminated by a severe illness in 2005.
On reading this, Geisel's current billboard sponsor abruptly terminated his contract.
The C.I.A. retired him after his psychoanalysis at the taxpayers' expense was abruptly terminated.
