Blacken
Blacken verb - To make dirty.
Become unhappy and blacken are semantically related. In some cases you can use "Become unhappy" instead a verb "Blacken".
Become unhappy
Blacken and become unhappy are semantically related. You can use "Blacken" instead a verb phrase "Become unhappy".
Mutual synonyms
Cite this Source
Become unhappy and Blacken. (2016). Retrieved 2026, August 02, from https://thesaurus.plus/related/blacken/become_unhappy
Blacken & Become unhappy. N.p., 2016. Web. 02 Aug. 2026. <https://thesaurus.plus/related/blacken/become_unhappy>.
Become unhappy or Blacken. 2016. Accessed August 02, 2026. https://thesaurus.plus/related/blacken/become_unhappy.
Google Ngram Viewer shows how "blacken" and "become unhappy" have occurred on timeline