Final answer:
Words such as "doublethink", "thoughtcrime", and "Big Brother" from Orwell's Newspeak have been incorporated into common English usage, reflecting concepts of contradiction, unorthodoxy, and surveillance respectively.
Step-by-step explanation:
Language is a dynamic force and George Orwell's novel 1984 introduced several terms from his fictional language Newspeak into English. From Newspeak, words like "doublethink", "thoughtcrime", and "Big Brother" are now commonly recognized and used in everyday language. "Doublethink" refers to the ability to hold two contradictory beliefs simultaneously.
"Thoughtcrime" is an unspoken but potentially punishable offense of harboring unorthodox thoughts that challenge existing norms or authorities. Lastly, "Big Brother" has permeated our culture as a synonym for pervasive and invasive surveillance, especially by a government or other authority.