fiendishly
- r as a devil; in an evil manner
- Google profiles are the search giant's fiendishly clever attempt to turn your ego-surfing pain into their gain.
- Instead of working out who owns what, lawyers and mediators are trying to figure out the fiendishly trickier conundrum of who owes what.
- While there's little doubt that humans are helping heat up the planet, the questions of how much, how quickly and leading to what consequences are fiendishly difficult to pin down.