(idiomatic) to get blood out of a stone, pull teeth (to do something very difficult or effortful)

a rolling stone gathers no moss

let him who is without sin cast the first stone (only those who are faultless have the right to pass judgement on others)

if one perseveres in doing something long enough, the desired effect, even if unlikely, will eventually be achieved

stone cutting; masonry / gem cutting

plural of pedra

plural of pedra no sapato

a blow with a rock / stone's throw (short distance) / trip

feminine singular of pedrado

feminine plural of pedrado