%pertu%

n. The state or quality of being imperturbable. [ 1913 Webster ]

a. [ L. imperturbabilis; pref. im- not + perturbare to disturb: cf. F. imperturbable. See Perture. ] Incapable of being disturbed or disconcerted; as, imperturbable gravity. [ 1913 Webster ]

adv. In an imperturbable manner; calmly. C. Bronté. [ 1913 Webster ]

n. [ L. imperturbatio. ] Freedom from agitation of mind; calmness; quietude. W. Montagu. [ 1913 Webster ]

a. Not perturbed. [ 1913 Webster ]

v. t. [ L. perturbare, perturbatum; per + turbare to disturb, fr. turba a disorder: cf. OF. perturber. See Per-, and Turbid. ] 1. To disturb; to agitate; to vex; to trouble; to disquiet. [ 1913 Webster ]

Ye that . . . perturb so my feast with crying. Chaucer. [ 1913 Webster ]

2. To disorder; to confuse. [ R. ] Sir T. Browne. [ 1913 Webster ]

n. The quality or state of being perturbable. [ 1913 Webster ]

a. Liable to be perturbed or agitated; liable to be disturbed or disquieted. [ 1913 Webster ]

n. Disturbance; perturbation. [ R. ] “Perturbance of the mind.” Sharp. [ 1913 Webster ]

v. t. [ From L. perturbatus, p. p. ] To perturb. [ Obs. ] Dr. H. More. [ 1913 Webster ]

a. Perturbed; agitated. [ R. ] [ 1913 Webster ]

n. [ L. perturbatio: cf. F. perturbation. ] 1. The act of perturbing, or the state of being perturbed; esp., agitation of mind. [ 1913 Webster ]

2. (Astron.) A disturbance in the regular elliptic or other motion of a heavenly body, produced by some force additional to that which causes its regular motion; as, the perturbations of the planets are caused by their attraction on each other. Newcomb. [ 1913 Webster ]

a. Of or pertaining to perturbation, esp. to the perturbations of the planets. “The perturbational theory.” Sir J. Herschel. [ 1913 Webster ]

a. Tending to cause perturbation; disturbing. Sir J. Herschel. [ 1913 Webster ]

n. A perturber. [ R. ] [ 1913 Webster ]

a. Agitated; disturbed; troubled. Shak. -- Per*turb"ed*ly, adv. [1913 Webster]

n. One who, or that which, perturbs, or cause perturbation. [ 1913 Webster ]

a. [ See Pertuse. ] (Bot.) Pierced at the apex. [ 1913 Webster ]

{ , a. [ L. pertusus, p. p. of pertundere to beat or thrust through, to bore through; per + tundere to beat: cf. F. pertus. Cf. Pierce. ] Punched; pierced with, or having, holes. [ 1913 Webster ]

n. [ L. pertusio. ] The act of punching or piercing with a pointed instrument; as, pertusion of a vein. [ R. ] Arbuthnot. [ 1913 Webster ]

2. A punched hole; a perforation. Bacon. [ 1913 Webster ]

‖n. [ NL., fr. L. per through, very + tussis cough. ] (Med.) The whooping cough. [ 1913 Webster ]