unplumbed

[ uhn-pluhmd ]

/ ʌnˈplʌmd /

not plumbed; not tested or measured with a plumb line.

not understood or explored in depth, as an idea, theory, feeling, or experience.

Origin of unplumbed

First recorded in 1615–25; un-¹ + plumb + -ed³

Down, down, to what unplumbed depths had it gone, those other times?

The Fate of Felix Brand |Florence Finch Kelly
Electricity for the ancients was an unplumbed ocean, whose slightest fluctuations affected them in ways they could not understand.

Thunder and Lightning |Camille Flammarion
Did we really live on desert islands, cut off so wholly from each other by the unplumbed, salt, estranging sea?

The Brimming Cup |Dorothy Canfield Fisher
Helen grew conscious of unplumbed depths, of instincts at which she was amazed and ashamed.

The Man of the Forest |Zane Grey

Justice is not done to the versatility and the unplumbed childishness of man's imagination.

The Pocket R.L.S. |Robert Louis Stevenson

unplumbed

/ (ʌnˈplʌmd) /

unfathomed; unsounded

not understood in depth

(of a building) having no plumbing