go for broke
do one's darnedest
do one's damnedest
move mountains
give something a try
give it one's best shot
take a stab at
take a crack at
go through fire and water
give something a go
go to the ends of the earth
finish up
prosecute
give something a whirl
attempt
hand and foot
strain every nerve
be at pains
take pains
go to the wall
walk on broken glass
break one's neck
assay
round off
damnedest
cut it fine
bust a gut
hold out
endure
come it
hang on
wear
ettle
keep on trucking
have a stab
do one's best
carry through
strive
full send
have a go
last burst of fire
effort
go to the trouble
seek
bid
give it a try
inclusively
give it some welly
pick up the gauntlet
take a dare