Antonyms of adj studious

2 senses of studious

Sense 1
studious -- (marked by care and effort; "made a studious attempt to fix the television set")

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
bookish, studious -- (characterized by diligent study and fondness for reading; "a bookish farmer who always had a book in his pocket"; "a quiet studious child")

INDIRECT (VIA scholarly) -> unscholarly -- (not scholarly)

Similarity of adj studious

2 senses of studious

Sense 1
studious -- (marked by care and effort; "made a studious attempt to fix the television set")
       => 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
bookish, studious -- (characterized by diligent study and fondness for reading; "a bookish farmer who always had a book in his pocket"; "a quiet studious child")
       => scholarly (vs. unscholarly) -- (characteristic of scholars or scholarship; "scholarly pursuits"; "a scholarly treatise"; "a scholarly attitude")