From George Orwell’s 1984, “Appendix: The Principles of Newspeak”:
The B vocabulary. The vocabulary consisted of words which had been deliberately constructed for political purposes: words, that is to say, which not only had in every case a political implication, but were intended to impose a desirable mental attitude upon the person using them. Without a full understanding of the principles of Ingsoc it was difficult to use these words correctly. In some cases, they could be translated into Oldspeak, or even into words taken from the A vocabulary, but this usually demanded a long paraphrase and always involved the loss of certain overtones. The B words were a sort of verbal shorthand, often packing whole ranges of ideas into a few syllables, and at the same time more accurate and forcible than ordinary language. …
Some of the B words had highly subtilized meanings, barely intelligible to anyone who had not mastered the language as a whole. (pp. 249, 250).