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Exam: TOEFL

sulphide

IPA: /ˈsʌlfaɪd/

KK: /ˈsʌlfaɪd/

noun

Definition: A type of chemical compound that contains sulfur and one or more other elements, typically formed when sulfur combines with metals or nonmetals.

Example: The geologist studied the sulphide minerals found in the rock samples.

sulphite

IPA: /ˈsʌlfaɪt/

KK: /ˈsʌlfaɪt/

noun

Definition: A type of chemical compound that contains sulfur and oxygen, often used as a preservative in food and beverages.

Example: The wine was treated with sulphite to prevent spoilage.

sulphur

IPA: /ˈsʌlfər/

KK: /ˈsʌlfər/

noun

Definition: A type of butterfly known for its yellow or orange wings, often with black markings, belonging to the genus Colias and related genera.

Example: I saw a beautiful sulphur butterfly fluttering in the garden.

sulphureous

IPA: //sʌlˈfjʊəriəs//

KK: /sʌlˈfjʊrəs/

adjective

Definition: Relating to or containing sulfur, often having a strong smell like that of rotten eggs.

Example: The sulphureous fumes from the volcano could be smelled from miles away.

sulphuric

IPA: //sʌlˈfjʊərɪk//

KK: /sʌlˈfjʊrɪk/

adjective

Definition: Relating to or containing sulfur, especially in a chemical form that is highly reactive and can cause burns.

Example: The laboratory used sulphuric acid for various experiments due to its strong properties.

sulphurous

IPA: /ˈsʌlfərəs/

KK: /ˈsʌlfərəs/

adjective

Definition: Relating to or containing sulfur, often associated with a strong, unpleasant smell.

Example: The sulphurous fumes from the volcano could be smelled miles away.

sultrier

IPA: /ˈsʌltriər/

KK: /ˈsʌltriər/

adjective

Definition: More hot and humid than usual, often in a way that feels uncomfortable or oppressive.

Example: The sultrier days of summer make it hard to enjoy outdoor activities.

sultriest

IPA: /ˈsʌltriːəst/

KK: /ˈsʌltriːɪst/

adjective

Definition: The most hot and humid, often making someone feel uncomfortable or causing a feeling of passion.

Example: The sultriest day of the summer left everyone seeking shade and cool drinks.

sultry

IPA: /ˈsʌltri/

KK: /ˈsʌltri/

adjective

Definition: This word describes weather that is very hot and humid, or it can refer to someone who expresses a strong sense of desire or attraction.

Example: The sultry summer evening made everyone feel romantic.

sum

IPA: /sʌm/

KK: /sʌm/

noun

Definition: The total amount that results from adding two or more numbers together, or a total amount of money.

Example: She won a large sum of money in the lottery.

transitive verb

Definition: To add together numbers or amounts to find a total.

Example: If you sum all the expenses, you will see how much you spent this month.

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