Crusty
Crusty adjective - Being or characterized by direct, brief, and potentially rude speech or manner.
Usage example: a crusty old fisherman who doesn't care to have his picture taken with silly tourists
Sincere and crusty are semantically related. In some cases you can use "Sincere" instead an adjective "Crusty".
Cite this Source
Sincere and Crusty. (2016). Retrieved 2026, August 07, from https://thesaurus.plus/related/crusty/sincere
Crusty & Sincere. N.p., 2016. Web. 07 Aug. 2026. <https://thesaurus.plus/related/crusty/sincere>.
Sincere or Crusty. 2016. Accessed August 07, 2026. https://thesaurus.plus/related/crusty/sincere.
Google Ngram Viewer shows how "crusty" and "sincere" have occurred on timeline