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Adjective: flat-footed  ,flat'fû-tid
  1. With feet flat on the ground; not tiptoe
  2. Unprepared and unable to react quickly
    "the new product caught their competitors flat-footed"
  3. Having broad flat feet that usually turn outward
    "a slow flat-footed walk"
  4. Without reservation
    "a flat-footed refusal"

See also: direct, footed, splayfoot, splayfooted, unready