the end of one's rope
impatiently
last straw
forbearing
at the end of one's tether
enough is enough
impatience
restlessness
gimme a break
uncaring
try
patience of a saint
patience of an angel
Job
abandon
pusillanimous
patience of Job
unmanly
hen-heartedness
poor-spirited
unconstraint
wantonness
unpitying
happy-go-lucky
uncared-for
remorseless
ruthless
pitiless
comfortable
imperturbation
impatient
sans-souci
steely-nerved
uncare
handleless
noncomposure
cheesed off
chicken-heartedness
exasperated
wearing
browned off
stubborn
cobelligerency
helpless
weary
nerve
spitelessness
immediacy
not have a care in the world
languidity