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Adjective: restive  res-tiv
  1. Being in a tense state
    - edgy, high-strung, highly strung, jittery, jumpy, nervy, overstrung, uptight, squirrelly [N. Amer]
  2. Impatient especially under restriction or delay
    "the government has done nothing to ease restrictions and manufacturers are growing restive"

See also: impatient, tense