stone, gem, precious stone, milestone, hailstone, anything hard, troublesome or intolerable, tombstone, epitaph, rock, unmarried daughter

stones, pebble

hit with stones, stoning

to turn into stone

stone in the bladder, kidney or gall bladder

rocky, gravelled, stone mixed, pebbly

to become stone, to be petrified, to become hard as stone, to become rigid, to be heavy or burdensome, to be unmerciful, to receive no impression, to be impervious (to), to be fixed or immovable, to be still as a statue, be stable, stand still

stone pelting

sharpening tools by rubbing them on a stone,

stony, rocky

firelock, musket

make motionless, stone

(of the eyes) become blind, turn hard and rigid like a stone

bowl made of stone used for grinding

small grinding bowl of stone

to pelt with stones, to stone

merciless

merciless

a hard heart

a difficult task to become easy

helplessness

be hard-hearted, cruel

become helpless due to hardships

coal, rock coal

a hard-hearted person to soften

a cruel have no pity

(Metaphorically) hard hearts never melt