| aboriginal | (adjective) characteristic of or relating to people inhabiting a region from the beginning | Synonyms: native |
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| (adjective) having existed from the beginning; in an earliest or original stage or state | Synonyms: primaeval, primal, primeval, primordial |
| corrigible | (adjective) capable of being corrected or set right | - |
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| dirigible | (adjective) capable of being steered or directed | Synonyms: steerable |
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| frigid | (adjective) extremely cold | Synonyms: arctic, gelid, glacial, icy, polar |
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| (adjective) devoid of warmth and cordiality; expressive of unfriendliness or disdain | Synonyms: frosty, frozen, glacial, icy, wintry |
| (adjective) sexually unresponsive | Synonyms: cold |
| incorrigible | (adjective) impervious to correction by punishment | - |
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| (adjective) difficult or impossible to manage or control | - |
| nonrigid | (adjective) designating an airship having a shape maintained only by internal gas pressure and without a supporting structure | - |
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| original | (adjective) being or productive of something fresh and unusual; or being as first made or thought of | - |
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| (adjective) (of e.g. information) not secondhand or by way of something intermediary | - |
| (adjective) not derived or copied or translated from something else | - |
| (adjective) preceding all others in time or being as first made or performed | - |
| originative | (adjective) having the ability or power to create | Synonyms: creative |
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| (adjective) containing seeds of later development | Synonyms: germinal, seminal |
| rigid | (adjective) designating an airship or dirigible having a form maintained by a stiff unyielding frame or structure | - |
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| (adjective) incapable of or resistant to bending | Synonyms: stiff |
| (adjective) incapable of compromise or flexibility | Synonyms: strict |
| (adjective) fixed and unmoving | Synonyms: fixed, set |
| (adjective) incapable of adapting or changing to meet circumstances | Synonyms: inflexible, unbending |
| semirigid | (adjective) not fully rigid | - |
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| (adjective) having a form maintained by a rigid internal structure as well as by internal gas pressure | - |
| unoriginal | (adjective) not original; not being or productive of something fresh and unusual | - |
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