proslavery

[ proh-sley-vuh-ree, -sleyv-ree ]

/ proʊˈsleɪ və ri, -ˈsleɪv ri /

favoring slavery.

U.S. History. favoring the continuance of the institution of slavery of blacks, or opposed to interference with it.

the favoring or support of slavery.

Origin of proslavery

An Americanism dating back to 1830–40; pro-¹ + slavery

pro·slav·er, noun pro·slav·er·y·ism, noun

Predictably, the pro-slavery faction also used the threat of hell to their favor.

Americans’ Burning Obsession With Hell |William O’Connor |September 26, 2014 |DAILY BEAST
Not that I cared much about their pro-slavery projects and palaverings.

Miss Ravenel's conversion from secession to loyalty |J. W. de Forest
I hope abolitionists will keep clear of such a pro-slavery atmosphere as surrounds the Mansion House.

A Visit To The United States In 1841 |Joseph Sturge
He knew the overmastering power of the pro-slavery administration would handle the main issue later—if not in peace, then in war.

The Little Lady of Lagunitas |Richard Henry Savage

While living in Arizona he incurred the displeasure of the pro-Slavery politicians, who ruled the territory.

The Secret Service. |Albert D. Richardson
On this infamous enactment, combined with a corrupted popular sentiment, the pro-slavery side depended for success.

The Underground Railroad |William Still

proslavery

/ (ˌprəʊˈsleɪvərɪ) /

in favour of or supporting slavery