Abrupt
Abrupt adjective - Being or characterized by direct, brief, and potentially rude speech or manner.
Usage example: the policeman's abrupt manner discouraged me from trying to claim that I hadn't seen the red light
Sincere and abrupt are semantically related. In some cases you can use "Sincere" instead an adjective "Abrupt".
Both words in one sentence
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The song starts off sincere and heartfelt enough, but the abrupt shift from "melancholy" to "kickass" is bizarre enough to inspire at least a few self-aware chuckles.
Source: Poe's Law
Cite this Source
Sincere and Abrupt. (2016). Retrieved 2026, August 07, from https://thesaurus.plus/related/abrupt/sincere
Abrupt & Sincere. N.p., 2016. Web. 07 Aug. 2026. <https://thesaurus.plus/related/abrupt/sincere>.
Sincere or Abrupt. 2016. Accessed August 07, 2026. https://thesaurus.plus/related/abrupt/sincere.
Google Ngram Viewer shows how "abrupt" and "sincere" have occurred on timeline