hypothymia
noun
hy·po·thy·mia
ˌhī-pō-ˈthī-mē-ə 
: an abnormal decrease in the intensity with which emotions are experienced : flatness of affect
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“Hypothymia.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/hypothymia. Accessed 31 Oct. 2025.
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