【正确答案】正确答案：There are several types of lexical relations concerning the sense of the words. Those are synonymy, antonymy, hyponymy, polysemy, homonymy, and so on. (a) Synonymy refers to the sameness relation; "autumn" and "fall" are synonyms, for example, (b) Antonymy refers to the oppositeness relation; for example, "buy" and "sell" are antonyms, (c) Hyponymy refers to the inclusiveness relation; for example, "apple" is a hyponym of "fruit", (d) Polysemy means one word that has more than one related meaning, and " bank" , as an example, is a polysemous word, (e) Homonymy refers to the relation of two different words which are identical either in sound, or spelling, or both, such as "bow" (bau) and "bow" (b