The phrase 'abandon it altogether' is correct and usable in written English.
You can use this phrase to indicate that you intend to completely stop doing something. For example: "I think it's best to abandon this project altogether."
But the LURD's fighters are now ignoring their politicians' call for a renewed ceasefire.Reluctant either to land its troops in Liberia, or to abandon it altogether, the United States risks being entangled in the sort of poorly-mandated, multinational intervention it has so often deplored.
"We may have to abandon it altogether," she said.
Mr. Hanenberger said he didn't want to rely on a standard holiday look but didn't want to abandon it altogether.
He was more optimistic, he said, that the Supreme Court would eventually have no choice but to declare the death penalty a failure and abandon it altogether.
A project becomes so expensive and difficult during the planning stage that the sensible course would be to abandon it altogether.
Earlier he had acknowledged that "without this money, we will have to delay the project for quite some time or even abandon it altogether".
Sometimes a successful taco run depends on honoring the idea of restraint — before abandoning it altogether.
After 1962 Ne Win's military regime abandoned it altogether, trampling on ethnic and religious minorities.
Wednesday's program reintroduced contemporary music as a polyglot culture, torn between continuing tradition and abandoning it altogether.
We may abbreviate the word in this country, but the French have abandoned it altogether (especially on the Côte d'Azur).
Salvaging the Wii U will be difficult, then, but abandoning it altogether could prove just as damaging to Nintendo's reputation.
