| 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 |
| arborical | (adjective) of or relating to or formed by trees | Synonyms: arborary, arboreal, arborous |
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| arboriform | (adjective) resembling a tree in form and branching structure | Synonyms: arboreal, arboreous, arborescent, arboresque, dendriform, dendroid, dendroidal, tree-shaped, treelike |
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| boric | (adjective) of or relating to or derived from or containing boron | Synonyms: boracic |
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| boring | (adjective) so lacking in interest as to cause mental weariness | Synonyms: deadening, dull, ho-hum, irksome, slow, tedious, tiresome, wearisome |
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| laboring | (adjective) doing arduous or unpleasant work | Synonyms: drudging, labouring, toiling |
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| laborious | (adjective) characterized by effort to the point of exhaustion; especially physical effort | Synonyms: arduous, backbreaking, grueling, gruelling, hard, heavy, operose, punishing, toilsome |
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| neighboring | (adjective) having a common boundary or edge; abutting; touching | Synonyms: adjacent, conterminous, contiguous, neighbouring |
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