形容詞 “hard”
 hard、比較級 harder、最上級 hardest
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 The rock was so hard that even the sharpest chisel couldn't scratch its surface. 
- 難しいLearning to play the violin is hard for many beginners. 
- 大変(多大な努力を要する)Studying for the final exams was [10903:3694#0 hard] work, but it paid off in the end. 
- 中毒性のあるCocaine is considered a hard drug because of its high potential for addiction. 
- アルコール入りのAt the party, they served a punch that turned out to be hard, much to everyone's surprise. 
- 硬水のThe hard water in our area makes it difficult to get soap to lather properly. 
- 鋭い影を作るThe hard light at noon created sharp shadows under the trees, making the scene perfect for dramatic photography. 
- 厳しいThe teacher's hard criticism left the student feeling discouraged. 
- 明白なThe judge demanded hard proof of the defendant's whereabouts on the night of the crime. 
- 物理的な形でのI prefer reading hard copies of books rather than using an e-reader. 
- 手作業のWhen the computer froze, I had to perform a hard shutdown by holding the power button until it turned off. 
- 鋭角の(角度が大きい、または90度の)When you reach the fork in the road, make a hard right to stay on the main path. 
- 性的に興奮している(俗語で)Seeing her in that tight dress made him instantly hard. 
- 爆発音のあるThe letter "g" is hard in "goat" but soft in "giraffe." 
- 非顎音化のIn Russian, the consonant "г" is pronounced harder before "а" than it is before "и". 
- 極端なHis views have shifted towards the hard left since he started attending the new discussion group. 
- 露骨なThe website was blocked because it contained hard pornography, which violated the internet usage policy. 
副詞 “hard”
- 力を込めてShe pushed the door hard, but it wouldn't budge. 
- 苦労してShe studied hard to pass the exam.