operoseness
laboriousness
toilsomeness
effortfulness
stretching
marathonic
effortful
pull
application
labored
diligence
effortlessness
laboured
heavy
full blast
struggle
a hundred and ten percent
demanding
endeavorment
work
multidisciplinariness
multidisciplinarity
labour
hard-fought
balls to the wall
manual
dead set
between
nitency
trouble
effectuousness
constructiveness
economical
expediteness
go for it
economic
put in the work
put out
technical
pedal to the metal
interstride
difficultness
with difficulty
difficulty
put the pedal to the metal
hard time
workability
power-assisted
rough sledding
wherewithal