lost train of thought

• distractedUnable to concentrate
• wanderingTraveling with no fixed course
• foggyObscured by vapor
• blankWithout marks or content
• scatteredSpread irregularly about

derailed · confused · zoned out · spaced out · forgotten · drifting · interrupted · unfocused · hazy · muddled · sidetracked · daydreaming · mid-sentence · pause · fumbling · where was I · mental block · tangent

• absent-mindednessabsent-minded, forgetfulness, distraction, spacing out, zoning out