unplumbed

adj. of unknown depth; not fully understood

Adjective
1. situated at or extending to great depth; too deep to have been sounded or plumbed; "the profound depths of the sea"; "the dark unfathomed caves of ocean"-Thomas Gray; "unplumbed depths of the sea"; "remote and unsounded caverns"
(synonym) profound, unfathomed, unsounded
(similar) deep

Synonyms and related words:
able, all-comprehensive, all-inclusive, boundless, countless, endless, enigmatic, eternal, exhaustless, extending everywhere, illimitable, illimited, immeasurable, immense, incalculable, incognizable, incomprehensible, inexhaustible, infinite, infinitely continuous, innumerable, interminable, interminate, limitless, measureless, mysterious, no end of, perpetual, puzzling, sealed, shoreless, strange, sumless, termless, unapparent, unapprehended, unascertained, unbeknown, unbounded, uncharted, uncircumscribed, unclassified, undisclosed, undiscoverable, undiscovered, undivulged, unexplained, unexplored, unexposed, unfamiliar, unfathomable, unfathomed, unheard, unheard-of, unidentified, uninvestigated, universal, unknowable, unknown, unlimited, unmeasurable, unmeasured, unnumbered, unperceived, unrevealed, unsuspected, untold, untouched, virgin, without bound, without end, without limit, without measure, without number
  

unplumbed /'ʌn'plʌmd/
tính từ không có dây dọi không được dò độ sâu (biển, sông...) bằng dây dò (nghĩa bóng) chưa dò, chưa thăm dò
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