Not previously walked, not previously explored or investigated.(adjective)
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Use "untrod" in a sentence
"Chosen the road well traveled by, rather than the untrod pathway."
"So he stood waist-deep in the grass and looked regretfully across the rolling savannah and the soft-swelling foothills to the Lion's Head, a massive peak of rock that upreared into the azure from the midmost centre of Guadalcanar, a landmark used for bearings by every coasting mariner, a mountain as yet untrod by the foot of a white man."
"Though I stay behind, my eyes can follow you from this night's landmark along the stretch, on to the city avenues, up the highways, tracing the twists of the bypaths, clambering untrod trails of wilderness and mountain, on, on, till out upon the sea."