← BackshareGuesssluggishness/ˈslʌɡɪʃnəs/nounThe state or quality of being slow, lazy, or lacking energy.The heat caused a feeling of sluggishness in the afternoon.The sluggishness of the internet connection frustrated everyone.Doctors say sluggishness can be a sign of dehydration.SynonymsslownesslanguorlethargyAntonymsenergy