Meanings of fiendishly hard in English

He always makes out he's fiendishly hard, but he's the most generous idiot ever born.

The prime minister must know that leaving the customs union and single market is fiendishly hard.

It was fiendishly hard and made even more so because he had forgotten to remove his companion's rucksack.

They are fiendishly hard to repeal.

That slippage of present into past is fiendishly hard to pull off, requiring an incredibly delicately calibrated manipulation of the reader's empathy.

Choose from family-friendly to fiendishly hard walks on a national trail starting in Wallsend near Newcastle and finishing on the Solway coast in Cumbria.