%ruga%

a. [ L. corrugatus, p. p. of corrugare; cor-+ rugare to wrinkle, ruga wrinkle; of uncertain origin. ] Wrinkled; crumpled; furrowed; contracted into ridges and furrows. [ 1913 Webster ]

v. t. [ imp. & p. p. Corrugated p. pr. & vb. n. Corrugating ] To form or shape into wrinkles or folds, or alternate ridges and grooves, as by drawing, contraction, pressure, bending, or otherwise; to wrinkle; to purse up; as, to corrugate plates of iron; to corrugate the forehead. [ 1913 Webster ]

Corrugated iron, sheet iron bent into a series of alternate ridges and grooves in parallel lines, giving it greater stiffness. --
Corrugated paper, a thick, coarse paper corrugated in order to give it elasticity. It is used as a wrapping material for fragile articles, as bottles. [ 1913 Webster ]

adj. shaped into parallel folds alternately grooved and ridged; as, the surface of the ocean was rippled and corrugated. [ WordNet 1.5 ]

n. [ Cf. F. corrugation. ] The act corrugating; contraction into wrinkles or alternate ridges and grooves. [ 1913 Webster ]

n. [ NL.; cf. F. corrugateur. ] (Anat.) A muscle which contracts the skin of the forehead into wrinkles. [ 1913 Webster ]

a. [ L. erugatus, p. p. of erugare to smooth; e out + ruga wrinkle. ] Freed from wrinkles; smooth. [ 1913 Webster ]

a. [ L. frugalis, fr. frugi, lit., for fruit; hence, fit for food, useful, proper, temperate, the dative of frux, frugis, fruit, akin to E. fruit: cf. F. frugal. See Fruit, n. ] 1. Economical in the use or appropriation of resources; not wasteful or lavish; wise in the expenditure or application of force, materials, time, etc.; characterized by frugality; sparing; economical; saving; as, a frugal housekeeper; frugal of time. [ 1913 Webster ]

I oft admire
How Nature, wise and frugal, could commit
Such disproportions. Milton. [ 1913 Webster ]

2. Obtained by, or appropriate to, economy; as, a frugal fortune. “Frugal fare.” Dryden. [ 1913 Webster ]

n.; pl. Frugalities [ L. frugalitas: cf. F. frugalité. ] 1. The quality of being frugal; prudent economy; that careful management of anything valuable which expends nothing unnecessarily, and applies what is used to a profitable purpose; thrift; --- opposed to extravagance. [ 1913 Webster ]

Frugality is founded on the principle that all riches have
limits. Burke. [ 1913 Webster ]

2. A sparing use; sparingness; as, frugality of praise.

Syn. -- Economy; parsimony. See Economy. [ 1913 Webster ]

adv. Thriftily; prudently. [ 1913 Webster ]

n. Quality of being frugal; frugality. [ 1913 Webster ]

a. Not frugal; wasteful; as, an infrugal expense of time. J. Goodman. [ 1913 Webster ]

v. t. [ L. irrugatus, p. p. of irrugare to wrinkle. ] To wrinkle. [ Obs. ] [ 1913 Webster ]

‖n.; pl. Rugae [ L. ] (Nat. Hist.) A wrinkle; a fold; as, the rugae of the stomach. [ 1913 Webster ]

a. [ L. rugatus, p. p. of rugare to wrinkle, fr. ruga a wrinkle. ] Having alternate ridges and depressions; wrinkled. Dana. [ 1913 Webster ]