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Definition of lassitude noun from the Oxford Advanced Learner's Dictionary

lassitude

noun
 
/ˈlæsɪtjuːd/
 
/ˈlæsɪtuːd/
[uncountable] (formal)
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  1. a state of feeling very tired in mind or body; lack of energy
    • I was overcome by lassitude.
    Word Originlate Middle English: from French, from Latin lassitudo, from lassus ‘tired’.
See lassitude in the Oxford Advanced American Dictionary
immunize
verb
 
 
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