opaque

/ou'peik/
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opaque

The teacher held up an opaque piece of plastic to the light.

Definition
  1. Adjective:
    • Not clearly understood or expressed: Difficult to comprehend; lacking clarity or transparency in meaning or intent.
    • Not transmitting or reflecting light or radiant energy; impenetrable to sight: Describing a material or substance that light cannot pass through, making it impossible to see through.
Usage Examples
  • Adjective:
    • The professor's explanation was so opaque that none of the students understood the concept. (Meaning: not clearly understood)
    • The bathroom window was made of opaque glass to ensure privacy. (Meaning: not transmitting light)
    • The company's financial reports were deliberately opaque, hiding its true losses. (Meaning: not clearly expressed)
Advanced Usage
  • "opaque to [something]": Impenetrable or not allowing the passage of a specific form of energy or information.
    • The material is opaque to ultraviolet rays, providing excellent sun protection.
    • His technical jargon was completely opaque to the general audience.
Variants and Related Words
  • Opacity (n): The quality or state of being opaque.
    • The opacity of the fog made driving dangerous.
  • Opaqueness (n): Another term for the state of being opaque (less common than 'opacity').
    • The opaqueness of the legal document frustrated everyone.
Synonyms
  • Unclear: Not easy to understand.
  • Cloudy: Not transparent; murky.
  • Impenetrable: Impossible to pass through or understand.
Antonyms
  • Transparent: Allowing light to pass through so objects can be distinctly seen; easy to perceive or understand.
  • Clear: Easy to perceive, understand, or interpret.
  • Lucidity: Clearness of thought or style.
Related Phrases
  • Linguistic opacity: A term in linguistics referring to parts of a language that are not phonetically transparent or are difficult for learners to analyze.
    • The irregular verb forms are a source of linguistic opacity for new students.
  • Opaque projector: A device that projects images of opaque materials (like book pages) onto a screen.
    • The teacher used an opaque projector to show illustrations from the textbook.
opaque

The teacher held up an opaque piece of plastic to the light.

Adjective
  1. not clearly understood or expressed
  2. not transmitting or reflecting light or radiant energy; impenetrable to sight
    • opaque windows of the jail
    • opaque to X-rays