An unlighted, unpaved stretch of waterfront lay before him, sagging structures and empty spaces of sky, warehouses, a crooked cornice hanging somewhere over a window with a malignant light.
Notice the malignant kind of resentment against any idea that propounds independence.
Roark saw a grimy desolation of tenements, sagging hulks of what had been red brick, crooked doorways, rotting boards, strings of gray underclothing in narrow air shafts, not as a sign of life, but as a malignant growth of decomposition.
There are no more uses of "malignant" in the book.
Show samples from other sources
Gey and his wife, Margaret, had spent the last three decades working to grow malignant cells outside the body, hoping to use them to find cancer’s cause and cure.
Rebecca Skloot -- The Immortal Life of Henrietta Lacks
He hit it [the shark] without hope but with resolution and complete malignancy.