CONTROVERSIAL
controversial
(adjective) marked by or capable of arousing controversy; “the issue of the death penalty is highly controversial”; “Rushdie’s controversial book”; “a controversial decision on affirmative action”
Source: WordNet® 3.1
Etymology
Adjective
controversial (comparative more controversial, superlative most controversial)
Arousing controversy—a debate or discussion of opposing opinions.
• Macaulay
Usage notes
• Nouns often used with "controversial": topic, subject, work, author, method, etc.
Synonyms
• contentious
• contested
Antonyms
• uncontroversial
• noncontroversial
• incontrovertible
Source: Wiktionary
Con`tro*ver"sial, a. Etym: [Cf. LL. controversialis.]
Definition: Relating to, or consisting of, controversy; disputatious;
polemical; as, controversial divinity.
Whole libraries of controversial books. Macaulay.
Source: Webster’s Unabridged Dictionary 1913 Edition