IPA: /lɛˈθɑrdʒɪkli/
KK: /lɛˈθɑrdʒɪkli/
In a way that shows a lack of energy or enthusiasm; doing something slowly and without much effort.
She moved lethargically through the house, struggling to find the energy to clean.
Lethargically → It is formed from "lethargy" (from Greek "lēthargia", meaning forgetfulness or inactivity) and the suffix "-ically" (meaning in a manner relating to). The word "lethargically" means in a manner that is characterized by lethargy or sluggishness.
Think of 'lethargy' as a state of being inactive or forgetful, and remember that 'lethargically' describes acting in that sluggish manner.