Regular
Regular adjective - Appearing or occurring repeatedly from time to time.
Unexplained is an antonym for regular.
Unexplained
Unexplained adjective - Not explained.
Both words in one sentence
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Characters come Back from the Dead on a regular basis, both in the story and game mechanics, but some stay dead for unexplained reasons.
Source: Franchise / Disgaea -
Unexplained Accent: Despite everybody else speaking regular English without any noticeable accent, the English dub has Thoma (and to a lesser extent, his mother and father) speak in some strange unidentifiable accent.
Source: Anime / Fantastic Children
Cite this Source
Unexplained and Regular. (2016). Retrieved 2026, August 14, from https://thesaurus.plus/related/regular/unexplained
Regular & Unexplained. N.p., 2016. Web. 14 Aug. 2026. <https://thesaurus.plus/related/regular/unexplained>.
Unexplained or Regular. 2016. Accessed August 14, 2026. https://thesaurus.plus/related/regular/unexplained.
Google Ngram Viewer shows how "regular" and "unexplained" have occurred on timeline