Antonyms of adj thorough

2 senses of thorough

Sense 1
thorough -- (painstakingly careful and accurate; "our accountant is thorough"; "thorough research")

INDIRECT (VIA careful) -> careless -- (marked by lack of attention or consideration or forethought or thoroughness; not careful; "careless about her clothes"; "forgotten by some careless person"; "a careless housekeeper"; "careless proofreading"; "it was a careless mistake"; "hurt by a careless remark")

Sense 2
exhaustive, thorough, thoroughgoing -- (performed comprehensively and completely; "an exhaustive study"; "made a thorough search"; "thoroughgoing research")

INDIRECT (VIA complete) -> incomplete, uncomplete -- (not complete or total; not completed; "an incomplete account of his life"; "political consequences of incomplete military success"; "an incomplete forward pass")

Similarity of adj thorough

2 senses of thorough

Sense 1
thorough -- (painstakingly careful and accurate; "our accountant is thorough"; "thorough research")
       => careful (vs. careless) -- (exercising caution or showing care or attention; "they were careful when crossing the busy street"; "be careful to keep her shoes clean"; "did very careful research"; "careful art restorers"; "careful of the rights of others"; "careful about one's behavior")

Sense 2
exhaustive, thorough, thoroughgoing -- (performed comprehensively and completely; "an exhaustive study"; "made a thorough search"; "thoroughgoing research")
       => complete (vs. incomplete) -- (having every necessary or normal part or component or step; "a complete meal"; "a complete wardrobe"; "a complete set of the Britannica"; "a complete set of china"; "a complete defeat"; "a complete accounting")