on one's mettle
give it one's best shot
damnedest
do one's darnedest
do one's damnedest
strain every nerve
level best
do one's utmost
do one's best
effort
go to the trouble
go for it
front up
try as one may
bear down
hustle
move mountains
hit a home run
dig deep
make do and mend
struggle
try
fight
break a sweat
gird up one's loins
best
darnedest
at pains
go for
make the best of a bad bargain
bid
try for
chalk up
trick
ply
attending
throw spaghetti at the wall
be at pains
take pains
go hard
go to the wall
ministrant
give one's all
bootstrap
win
harden
have a go
gain
go to extraordinary lengths
give it a try
lay to
indurate
acquire
bust one's hump
bust a gut
as best one can
method of choice
subtlety
bestowal
helpable
marathonic
give it some welly
show willing
application
dead set
diligence
make hard work of
put a shift in
give something a try
with difficulty
push
effortfulness
strivingly
beaver
bring it
laboring oar
exert
slave
operations research
strife
endeavorer
top oneself
sweat
graft
buck
behovefully
make the best of a bad job
purchase
balls to the wall
put the pedal to the metal
put one's shoulder into
bag of tricks
make a play
go to the ends of the earth
endeavor
strive
auxiliarly
self-possessedly
ettle