at the mercy of
In the power of; defenceless/defenseless against.
The ball game is scheduled for Saturday, but we're still at the mercy of the weather.
ADJ
divine, infinite
The priest spoke of divine mercy as the only hope for sinners seeking forgiveness.
VERB + MERCY
ask for, beg for, plead for, scream for
have, show (sb)
The judge showed mercy to the young offender and gave him a lighter sentence.
MERCY + NOUN
dash, flight, mission
The hospital organized a mercy mission to help people affected by the earthquake.
killing
PREP
at the ~ of
The small boat was completely at the mercy of the strong ocean currents.
without ~
The dictator ruled his country without mercy, punishing anyone who opposed him.