literary 1 adjective without mercymíthrócaireach adj1 c m ugan trua gan taise c m ua pitiless enemynamhaid gan trua gan taise2 adjective relentless, intensemíthrócaireach adj1 c m uthe pitiless sun beamed down on usbhí an ghrian ag scalladh go míthrócaireach orainnthere were a few days of pitiless rainbhí sé ag cur báistí gan stad gan staonadh ar feadh cúpla lá