so frightened as to be unable to move; stunned or paralyzed with terror; "petrified with fear"; "she was petrified by the eerie sound"; "too numb with fear to move"
harshly uninviting or formidable in manner or appearance; "a dour, self-sacrificing life"; "a forbidding scowl"; "a grim man loving duty more than humanity"; "undoubtedly the grimmest part of him was his iron claw"- J.M.Barrie
a sustained muscular contraction resulting from a rapid series of nerve impulses
an acute and serious infection of the central nervous system caused by bacterial infection of open wounds; spasms of the jaw and laryngeal muscles may occur during the late stages