difficult

• adj.困難な; 不愉快な; 頑固な

facile, simple, well-done, 語源的にはfact, efficientと同じである。

difficult

difficult: [14] Difficult means literally ‘not easy’. It is a back-formation from difficulty [14], which was borrowed from Latin difficultās. This was a derivative of the adjective difficilis (source of French difficile), which was a compound formed from the prefix dis- ‘not’ and facilis ‘easy’ (whence English facile [15]).
=> facile

difficult (adj.)

c. 1400, apparently a back-formation from difficulty. French has difficile, Latin difficilis. Of persons, "hard to please," from 1580s.

1. He had a reputation for being bloody-minded and difficult .

彼は冷酷で付き合いにくい人として有名だ。

2.I have a fair idea of how difficult things can be.

状況を大まかに理解するのがどれだけ難しいか。

3.It would be difficult to find two men who were more dissimilar.

お互いの差が大きい人を見つけるのは難しい。

4.There 's no petrol，so it 's very difficult to transport goods.

はガソリンがないので、荷物を運ぶのは難しい。

5.Adults need to live their own lives and that 's difficult with children.

大人は自分たちの生活を送る必要がありますが、子供がいるとなかなかできません。