Deep
Deep adjective - Extending far downward.
Protracted and deep are semantically related In some cases you can use "Protracted" instead an adjective "Deep".
Protracted
Protracted adjective - Relatively long in duration; tediously protracted.
Deep and protracted are semantically related in long topic. Sometimes you can use "Deep" instead an adjective "Protracted".
Cite this Source
Protracted and Deep. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/deep/protracted
Deep & Protracted. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/deep/protracted>.
Protracted or Deep. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/deep/protracted.
Google Ngram Viewer shows how "deep" and "protracted" have occurred on timeline