In a lazy or unfocused way without any particular purpose or energy.
From 'idle' (from Old English 'idel' meaning 'empty' or 'useless') plus the adverb suffix '-ly.' The meaning has remained consistent across centuries.
Your brain actually uses about 20% of your body's energy—when you're idly daydreaming, it's often running complex simulations to prepare you for the future!
Complete word intelligence in one call. Free tier — 50 lookups/day.