Prefix · hidden / secret
From Greek "kryptos" (hidden): found in words about secret codes, concealed things, and digital security.
Written by Bryan López, English teacher · Updated
"Crypt-" / "crypto-" comes from Greek "kryptos," meaning hidden or concealed. It appears in historical words (cryptography, apocryphal) and modern technology (cryptocurrency, encryption). The unifying idea is always something concealed, coded, or hard to decipher.
Spanish uses "cripto-": criptografía (cryptography), criptomoneda (cryptocurrency). The verb "encriptar" (to encrypt) is built on this root. The word "cripta" (crypt), an underground vault, preserves the original sense of a hidden place.
Crypt- / crypto- combines with other roots to describe secrecy and concealment:
"Apocryphal" comes from "apo-" (away from) + "kryptos" (hidden): texts kept hidden from the official canon, now meaning stories of doubtful authenticity. Even Superman's "kryptonite" — his hidden weakness — plays on this root.
crypt-/krɪpt/
Tap the button to hear how the prefix sounds. Each word in the table has its own audio.
While "crypto" has been popularized by cryptocurrency, the prefix predates it by centuries: cryptography, apocryphal, cryptic, kryptonite. Do not let the modern financial use overshadow the broader meaning of "hidden" across all contexts.
A trick to remember it
Crypt- = hidden or secret. A crypt is a hidden underground vault; cryptography hides messages in code; something cryptic hides its meaning behind obscure language. In the digital age, encryption hides your data from unauthorized access — the ancient Greek root is more relevant than ever.
Exercise 1 · Form the word
Exercise 2 · Pick the right one
A message described as "cryptic" is best described as ___.
The prefix crypt- from Greek "kryptos" (hidden): found in words about secret codes, concealed things, and digital security. In Spanish it usually maps to cripto-.
The prefix crypt- is pronounced /krɪpt/. For example, "cryptography".
"ography" becomes "cryptography". It is a typical example of the crypt- prefix.
From Greek "kosmos" (universe, order): found in words about space, the whole world, and universal scale.
Signals relation to the nervous system: neuron, neuroscience, neurotransmitter, neuroplasticity.
Signals something false or pretending to be what it is not: pseudonym, pseudoscience, pseudocode.
un-, re-, pre-, dis-, over-, in-... every beginning you need to unlock thousands of English words at once.