Comparative form of profound: more profound(adjective)
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Use "profounder" in a sentence
"But the mair I think on't, the profounder is my conviction that the strength o 'human nature lies either in the highest or lowest estate of life."
"They pursued their discoveries with avidity, because few had access to their opportunities in that respect, and because, the profounder were their researches, the more sure they were of being looked up to by the public as having that in them which was sacred and inviolable."
"Their faces remained peculiarly relaxed and placid, incurious and pleasant, while in their eyes floated profounder dreams."