rigid or severe in demands or requirements

an exacting teacher.

requiring close application or attention

an exacting task.

given to or characterized by exaction; extortionate.

adjective

giving , lending

adjective

burdensome , by the book , careful , critical , difficult , exigent , finicky , fussy , grievous , hard , harsh , hypercritical , imperious , nit-picking , onerous , oppressive , painstaking , particular , persnickety , picky , precise , rigid , rigorous , severe , stern , strict , stringent , taxing , tough , trying , unsparing , weighty , demanding , unyielding , choosy , dainty , fastidious , finical , meticulous , squeamish , arduous , backbreaking , effortful , formidable , heavy , laborious , rough , direct , peremptory , pressing