IPA: //ˈslʌɡɪʃli//
KK: /ˈslʌɡɪʃli/
In a way that is slow and lazy, lacking energy or movement.
He moved sluggishly after staying up all night studying.
Sluggishly → It is formed from "sluggish" (from Middle English *slugge*, meaning slow or lazy) and the suffix "-ly" (meaning in a manner of). The word "sluggishly" means in a slow or lazy manner.
Think of someone moving slowly or lazily, as suggested by 'sluggish', and remember that 'sluggishly' describes doing something in that slow manner.