Lethargic

/lɪˈθɑːrdʒɪk/ adjective easy

Sluggish and lacking energy, often due to tiredness or illness.

The heavy lunch left everyone feeling lethargic through the afternoon meeting.

Memory Trick

Comes from 'lethargy' — picture the mythical river Lethe, whose waters were said to cause a drowsy, forgetful haze.