impurity

Từ điển Oxford Advanced Learner 8th

im·pur·ity [impurity impurities] BrE [ɪmˈpjʊərəti] NAmE [ɪmˈpjʊrəti] noun (pl. im·pur·ities)
1. countable a substance that is present in small amounts in another substance, making it dirty or of poor quality
•A filter will remove most impurities found in water.
2. uncountable the state of being dirty or not pure
Opp: ↑purity

Word Origin:
late Middle English: from French impurite or Latin impuritas, from impurus, from in- ‘not’ + purus ‘pure’.

Example Bank:
•The substance is free of impurities.
•The water contains impurities which make it unsuitable for drinking.

• Từ đồng nghĩa / Synonyms:
  impureness, dross
• Từ trái nghĩa / Antonyms:
  purity, pureness