Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • adj. Having a rough irregular surface. See Synonyms at rough.
  • adj. Having strong features marked with furrows or wrinkles: the rugged face of the old sailor.
  • adj. Having a sturdy build or strong constitution: a rugged trapper who spent months in the wilderness.
  • adj. Tempestuous; stormy: the rugged weather of the North Atlantic.
  • adj. Demanding great effort, ability, or endurance: the rugged conditions of barracks life.
  • adj. Lacking culture or polish; coarse and rude: rugged manners and ribald wit.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Broken into sharp or irregular points; uneven; not smooth; rough
  • adj. Not neat or regular; irregular, uneven.
  • adj. Rough with bristles or hair; shaggy.
  • adj. strong, sturdy, well-built
  • adj. rocky and bare of plantlife
  • adj. Harsh; austere; hard; crabbed; -- said of temper, character, and the like, or of persons.
  • adj. Stormy; turbulent; tempestuous; rude.
  • adj. Harsh; grating; rough to the ear -- said of sound, style, and the like.
  • adj. Sour; surly; frowning; wrinkled; -- said of looks, etc.
  • adj. Violent; rude; boisterous; -- said of conduct, manners, etc.
  • adj. Vigorous; robust; hardy; -- said of health, physique, etc.
  • adj. designed to reliably operate in harsh usage environments and conditions
  • adj. Having a rug or rugs.
  • adj. Covered with a rug.
  • v. Simple past tense and past participle of rug.

from the GNU version of the Collaborative International Dictionary of English

  • adj. Full of asperities on the surface; broken into sharp or irregular points, or otherwise uneven; not smooth; rough.
  • adj. Not neat or regular; uneven.
  • adj. Rough with bristles or hair; shaggy.
  • adj. Harsh; hard; crabbed; austere; -- said of temper, character, and the like, or of persons.
  • adj. Stormy; turbulent; tempestuous; rude.
  • adj. Rough to the ear; harsh; grating; -- said of sound, style, and the like.
  • adj. Sour; surly; frowning; wrinkled; -- said of looks, etc.
  • adj. Violent; rude; boisterrous; -- said of conduct, manners, etc.
  • adj. Vigorous; robust; hardy; -- said of health, physique, etc.

from The Century Dictionary and Cyclopedia

  • Having a rough, hairy surface or nap; shaggy; bristly; ragged.
  • Covered with rough projections; broken into sharp or irregular points or prominences; rough; uneven: as, a rugged mountain; rugged rocks.
  • Wrinkled; furrowed; corrugated; hence, ruffled; disturbed; uneasy.
  • Rough to the ear; harsh; grating.
  • Unsoftened by refinement or cultivation; rude; homely; unpolished; ignorant.
  • Rough in temper; harsh; hard; austere.
  • Marked by harshness, severity, or anger; fierce; rough; ungentle.
  • Rough; tempestuous: said of the sea or weather.
  • Vigorous; robust; strong in health.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adj. very difficult; severely testing stamina or resolution
  • adj. sturdy and strong in constitution or construction; enduring
  • adj. having long narrow shallow depressions (as grooves or wrinkles) in the surface
  • adj. topographically very uneven

Etymologies

Middle English, shaggy, of Scandinavian origin.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From Middle English rugged, roggyd, ruggyd, from Swedish rugg ("shaggy hair") (see rug) + -ed. (Wiktionary)
rug + -ed (Wiktionary)

Examples

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