Brain wave
Brain wave noun - (neurophysiology) rapid fluctuations of voltage between parts of the cerebral cortex that are detectable with an electroencephalograph.
Unobtainable and brain wave are semantically related. In some cases you can use "Unobtainable" instead an adjective phrase "Brain wave".
Unobtainable
Unobtainable adjective - Hard or impossible to get to or get at.
Brain wave and unobtainable are semantically related. Sometimes you can use "Brain wave" instead an adjective "Unobtainable".
Mutual synonyms
Cite this Source
Unobtainable and Brain wave. (2016). Retrieved 2026, August 13, from https://thesaurus.plus/related/brain_wave/unobtainable
Brain wave & Unobtainable. N.p., 2016. Web. 13 Aug. 2026. <https://thesaurus.plus/related/brain_wave/unobtainable>.
Unobtainable or Brain wave. 2016. Accessed August 13, 2026. https://thesaurus.plus/related/brain_wave/unobtainable.
Google Ngram Viewer shows how "brain wave" and "unobtainable" have occurred on timeline