| corrugated | (adjective) shaped into alternating parallel grooves and ridges | - |
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| drugged | (adjective) under the influence of narcotics | Synonyms: doped, narcotised, narcotized |
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| drugless | (adjective) without the use of drugs | - |
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| frugal | (adjective) avoiding waste | Synonyms: economical, scotch, sparing, stinting |
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| rugged | (adjective) sturdy and strong in constitution or construction; enduring | - |
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| (adjective) having long narrow shallow depressions (as grooves or wrinkles) in the surface | Synonyms: furrowed |
| (adjective) very difficult; severely testing stamina or resolution | Synonyms: tough |
| (adjective) topographically very uneven | Synonyms: broken |
| rugose | (adjective) of leaves; ridged or wrinkled | - |
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| struggling | (adjective) engaged in a struggle to overcome especially poverty or obscurity | - |
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