9th Grade Vocabulary Words - List 11
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| Word | Definition | Practice Sentence | Synonyms | Antonyms | Part of Speech Description |
|---|---|---|---|---|---|
| karst | A distinctive landscape characterized by unique landforms, such as sinkholes, springs, and caves, that result from the dissolution of soluble rocks. | The limestone region is known for its intricate karst landscape. | limestone, sinkhole, cavern | Noun | |
| knead | Manipulating or working a substance such as dough with the hands by pressing, folding, and stretching. | I need to knead the dough for at least 10 minutes to achieve the right consistency. | shape, manipulate, squeeze | Verb | |
| noxious | Something that is extremely harmful or poisonous. | The noxious fumes from the factory made it difficult to breathe. | toxic, dangerous, deleterious | beneficial, harmless, innocuous | Adjective |
| kaput | No longer functioning or able to operate properly. | My old car finally gave up and is completely kaput. | broken, inoperative, damaged | functioning, operational, working | Adjective |
| hazard | Something that poses a potential risk or danger to individuals, properties, or the environment. | Please be careful, as there is a hazard on the road ahead. | risk, peril, threat | safety, security, protection | Noun |
| component | A constituent part or element of a larger whole. | The motherboard is a vital component of a computer. | piece, unit, module | whole, entirety, aggregate | Noun |
| incredulous | Expressing or showing disbelief or skepticism towards something. | I was incredulous when I heard that she won the lottery for the third time in a row. | suspicious, doubtful, disbelieving | certain, confident, credulous | Adjective |
| ozone | A molecule composed of three oxygen atoms bonded together. | The ozone layer acts as a shield against harmful ultraviolet rays from the sun. | O3 | Noun | |
| perceptible | Able to be detected by the human senses, such as sight, hearing, touch, taste, or smell. | The sound of footsteps became perceptible as the person approached. | noticeable, observable, tangible | intangible, unnoticeable, impalpable | Adjective |
| menace | Someone or something that poses a threat or danger to others by displaying aggressive or harmful behavior. | The criminal was a menace to society. | peril, risk, trouble | friend, helper, protector | Noun |
| nonchalant | A state of being unconcerned or indifferent. | She walked into the room with a nonchalant attitude, as if she didn't have a care in the world. | carefree, relaxed, composed, apathetic | concerned, attentive, focused | Adjective |
| bicameral | A governmental system that consists of two separate legislative chambers or houses. | The United States Congress is a bicameral legislature consisting of the House of Representatives and the Senate. | two-chambered | Adjective | |
| impervious | To be unable to be penetrated or affected by something. | The thick concrete walls were impervious to the loud noises outside. | resistant, invulnerable, impregnable | vulnerable, penetrable, susceptible | Adjective |
| tumultuous | A state of chaos or confusion, characterized by loud noises, disorderly behavior, and a lack of order or calm. | The tumultuous crowd erupted in protests and chaos, while the police tried to maintain order. | uproar, commotion, disorder | calm, peace, tranquility | Adjective |
| equivalent | Equal in value, amount, or significance. | She is my equivalent in intelligence and skill. | comparable, corresponding, similar | unequal, dissimilar, opposite | Noun |
Take a look at other vocabulary lists for ninthgrade.
ninthgrade Vocabulary Lists