Prefix · false / pretending to be
Signals something false or pretending to be what it is not: pseudonym, pseudoscience, pseudocode.
Written by Bryan López, English teacher · Updated
Pseudo- comes from Greek "pseudos" (lie, falsehood) and signals something that appears to be what it is not, or that pretends to have properties it lacks: pseudonym = a false name used instead of a real one; pseudoscience = a discipline that pretends to be scientific but lacks empirical basis; pseudo-intellectual = someone who pretends to be an intellectual without truly being one; pseudopod = a cellular extension that mimics a limb.
In literary and critical usage, pseudo- carries a connotation of imposture or deception: pseudo-democratic = appearing democratic without being so; pseudo-random = appearing random but following a deterministic algorithm (in computing); pseudepigrapha = texts falsely attributed to an author. The prefix invites scepticism: if something is labelled pseudo-, one should question whether it is what it claims to be.
Attaches to nouns and adjectives. Spanish uses "pseudo-" or "seudo-":
Pronunciation: /ˈsjuːdəʊ/. The initial "p" may be silent in informal speech. Spanish accepts both "pseudo-" and "seudo-" spellings.
pseudo-/ˈsjuːdəʊ/
Tap the button to hear how the prefix sounds. Each word in the table has its own audio.
"Pseudonym" = a name deliberately adopted for professional or published use (pen name, stage name): George Orwell (Eric Blair), Voltaire (François-Marie Arouet). A "nickname" is informal, usually given by others, often affectionate or humorous. Pseudonyms are formal and self-chosen; nicknames are informal and often imposed.
"Pseudoscience" includes astrology, homeopathy, and aura reading. What defines them is not being new or controversial (quantum physics was controversial) but that they cannot be falsified, make no verifiable predictions, or systematically ignore contradicting evidence.
A trick to remember it
Pseudo- = "false" or "pretending to be": pseudonym = a false name, pseudoscience = a discipline pretending to be scientific, pseudo-intellectual = someone pretending to be an intellectual. Spanish: "pseudo-" or "seudo-." The prefix invites scepticism: if something is called pseudo-, question whether it is what it claims.
Exercise 1 · Form the word
Exercise 2 · Pick the right one
"Astrology is often cited as a ___ because its claims cannot be tested or disproved scientifically."
Exercise 3 · Pick the right one
What is the difference between a "pseudonym" and a "nickname"?
The prefix pseudo- signals something false or pretending to be what it is not: pseudonym, pseudoscience, pseudocode. In Spanish it usually maps to pseudo- / seudo-.
The prefix pseudo- is pronounced /ˈsjuːdəʊ/. For example, "pseudonym".
"nym" becomes "pseudonym". It is a typical example of the pseudo- prefix.
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