needing and using much energy and thought

difficult, hard to endure

deliberately forced; insincere

overly planned

requiring much effort, strength, skill or ability

hard on someone; hard to do

having much detail

intricate; involved

hesitating; uncertain

hesitant

not elegant

clumsy, crude

needing, showing, great effort

hard, difficult

(of written style, talk, behaviour etc) too formal and unnatural

artificial, pretentious

not natural or normal

not regular; artificial

(moving) in the opposite direction to the stream or current

hard on someone; hard to do