Abide (verb) رہنا، احترام کرنا، پابند رہنا

accept or act in accordance with (a rule, decision, or recommendation).
Example: “I said I would abide by their decision”
Merciless (adjective) بے درد، بے رحم، ظالم

showing no mercy.
Example: “a merciless attack with a blunt instrument”