demanding

adjectives

requiring more than usually expected or thought due; especially great patience and effort and skill
"found the job very demanding"; "a baby can be so demanding"
demanding
antonym
undemanding
is similar to
requiring precise accuracy
"an exacting job"; "became more exigent over his pronunciation"
exacting, exigent
is similar to
(of persons) "his father was a hard-to-please taskmaster"
"was very hard to please"
hard to please, hard-to-please
is similar to
demanding or needing attention, affection, or reassurance to an excessive degree
needy
is similar to
demanding strict attention to rules and procedures
"rigorous discipline"; "tight security"; "stringent safety measures"
rigorous, stringent, tight
is similar to
severe and unremitting in making demands
"an exacting instructor"; "a stern disciplinarian"; "strict standards"
exacting, stern, strict
see also
not easy; requiring great physical or mental effort to accomplish or comprehend or endure
"a difficult task"; "nesting places on the cliffs are difficult of access"; "difficult times"; "why is it so hard for you to keep a secret?"
difficult, hard