56. Use the passage below to answer the question that follows.
He was a hard, stubborn old man. A smile rarely broke through the hard features of his face. He had worked hard all his life, but life had been hard on him. It never gave him a break. He struggled to break the hard ground year after year. He asked the earth to give a little back, but it repeatedly broke his heart. He took it hard.
This passage best illustrates which of the following concepts related to English vocabulary that can pose challenges for English language learners' comprehension and development of communicative language competence?