American spelling: to convert to or cause to support abolition; to make something abolitionist in character or principle.
From abolition (Latin abolitionem) plus the verb-forming suffix -ize (from Greek -izein, meaning to make or cause to become), following the standard American spelling convention.
The fact that 'abolitionize' exists shows English speakers loved being precise about action—they didn't just 'believe in abolition,' they actually 'abolitionized' communities and institutions by converting people to the cause.
Complete word intelligence in one call. Free tier — 50 lookups/day.