Complex
Complex adjective - Having many parts or aspects that are usually interrelated.
Usage example: complex issues regarding free speech and school discipline
Impenetrable is a synonym for complex in complicated topic. In some cases you can use "Impenetrable" instead an adjective "Complex", when it comes to topics like difficult to understand.
Impenetrable
Impenetrable adjective - Impossible to get through or into.
Complex is a synonym for impenetrable. Sometimes you can use "Complex" instead an adjective "Impenetrable".
Nearby Words: impenetrability, impenetrably
Mutual synonyms
Related pairs
- deep and complex
- deep and impenetrable
- difficult and complex
- difficult and impenetrable
- heavy and complex
- heavy and impenetrable
- hard and complex
- hard and impenetrable
- tough and complex
- tough and impenetrable
- abstruse and complex
- abstruse and impenetrable
- unfathomable and complex
- unfathomable and impenetrable
Both words in one sentence
- Primer features the most complex (read: impenetrable) time travel plot in film.
Source: Doing It For The Art / Film
Cite this Source
Impenetrable and Complex. (2016). Retrieved 2026, August 15, from https://thesaurus.plus/related/complex/impenetrable
Complex & Impenetrable. N.p., 2016. Web. 15 Aug. 2026. <https://thesaurus.plus/related/complex/impenetrable>.
Impenetrable or Complex. 2016. Accessed August 15, 2026. https://thesaurus.plus/related/complex/impenetrable.
Google Ngram Viewer shows how "complex" and "impenetrable" have occurred on timeline