Frank J. Wilstach, comp. A Dictionary of Similes. 1916.

Indistinct

Indistinct, like a vapor exhaled by the earth.
—Joseph Conrad

Indistinct, like language uttered in a dream.
—William Cowper

Indistinct like the echo of a symphony dying away.
—Gustave Flaubert

Indistinct as the premonition of calamity.
—Nathaniel Hawthorne

Indistinct as water is in water.
—William Shakespeare

Indistinct as a camel’s track between Mourzouk and Darfour.
—Henry D. Thoreau

Indistinctly visible as through a white gauze veil.
—Mrs.
—Trollope