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Verb: fall behind  fol bi'hInd
  1. Retreat
    - fall back, drop off, recede
  2. Hang (back) or fall (behind) in movement, progress, development, etc.
    - lag, dawdle, fall back

Derived forms: falling behind, fell behind, falls behind, fallen behind

See also: fall

Type of: follow, regress, retrograde, retrogress