Hard-core
Hard-core adjective - Firmly established over time.
Usage example: the hard-core habits that generate our mountains of trash everyday will be extremely difficult to change
Cite this Source
Integral and Hard-core. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/hard-core/integral
Hard-core & Integral. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/hard-core/integral>.
Integral or Hard-core. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/hard-core/integral.