The correct spelling of "poisonous substances" is [ˈpɔɪznəs səbˌstænsɪz]. The word "poisonous" is pronounced with a voiced "z" sound at the end, rather than an unvoiced "s" sound. This is because the preceding vowel sound is a voiced "oy" sound, which requires a voiced consonant to create a smoother transition between the two sounds. "Substances" is spelled with a "c" instead of an "s" because "c" is used before "e" or "i" in English to make the "s" sound.
Poisonous substances refer to any material, chemical, or natural product that has the potential to cause harm or even death when ingested, inhaled, or otherwise put into contact with the body. These substances typically possess toxic properties that can seriously disrupt the normal functioning of organisms and bodily systems.
Poisonous substances can exist in various forms such as liquids, gases, powders, or solids. They are often characterized by their ability to undergo chemical reactions with biological entities, leading to adverse effects. Many poisonous substances act by interfering with or damaging essential biological processes, including cellular functions, enzyme activities, or organ systems.
Examples of poisonous substances can be found in a wide range of sources, including certain plants, animals, chemicals, drugs, toxins, or pollutants. These substances may vary in their potency and mode of action, with some causing immediate effects upon exposure, while others may show delayed or cumulative toxic effects.
Because of the potential dangers associated with poisonous substances, it is crucial to handle, store, and dispose of them in a safe manner, taking into account their specific characteristics. Specialized knowledge and precautions, such as using protective equipment, following proper protocols, and seeking medical assistance as necessary, are essential in dealing with these substances to minimize the risks of poisoning and subsequent harm to individuals and the environment.
The word "poisonous" originated from the Old French word "poison" which can be traced back to the Latin word "potio" meaning "a drink, a potion". In Latin, "potio" referred to a liquid concoction, often including medicinal or toxic ingredients. Over time, the term expanded to include anything harmful when ingested or absorbed, leading to the meaning of "poison" as a substance that causes illness, injury, or death.
The word "substances" comes from the Latin word "substantia" which means "substance, essence, nature". It is derived from the verb "substantiare" which represents the combination of the prefix "sub-" (meaning "under") and the verb "stare" (meaning "to stand"). Accordingly, "substantia" refers to the underlying or essential nature of something.