B1 adjective ニュートラル #40 よく出る 2分で読める

infested

/ɪnˈfɛstɪd/

Use 'infested' to describe a place significantly and problematically filled with unwanted creatures, especially pests.

30秒でわかる単語

  • A place filled with unwanted creatures.
  • Implies a problem needing attention.
  • Often used for pests like insects or rodents.

**Overview**

The word 'infested' describes a state where a place, object, or even a system is overrun by a large, unwelcome population of organisms, typically insects, rodents, or other pests. It carries a negative connotation, suggesting a lack of hygiene, control, or comfort due to the presence of these unwelcome inhabitants. The term is often used to highlight a problem that requires attention and remediation.

**Usage Patterns**

'Infested' is most commonly used as a postpositive adjective, meaning it follows the noun it modifies, often after a linking verb like 'is', 'was', 'are', or 'were'. For example, 'The kitchen was infested with ants.' It can also be used attributively, directly before the noun, though this is less common and can sound more literary or dramatic, such as 'an infested attic'. The word implies a significant presence, not just a few stray creatures.

**Common Contexts**

This word frequently appears in contexts related to health, hygiene, and property maintenance. You might hear about an 'infested' house in discussions about pest control, a report on a 'infested' forest due to a bark beetle problem, or even a metaphorical use describing a computer system 'infested' with viruses. It's common in news reports about public health issues, discussions about gardening or farming problems, and in descriptions of neglected or unsanitary environments.

**Similar Words Comparison**:

  • Swarming: 'Swarming' implies a very large number of creatures moving together, often insects like bees or locusts. While an infested area might be swarming, 'swarming' focuses more on the movement and sheer numbers at a given moment, whereas 'infested' suggests a more established, problematic presence.
  • Overrun: 'Overrun' is a broader term that can apply to pests but also to things like weeds or even armies. It means to spread over and take control of a place. 'Infested' is more specific to living creatures, particularly pests.
  • Plagued: 'Plagued' can be used for pests, but it also strongly implies a persistent source of trouble or annoyance, often metaphorical. 'The village was plagued by mosquitoes' is similar to 'infested', but 'He was plagued by self-doubt' uses it metaphorically.

例文

1

The old, damp basement was infested with spiders and silverfish.

everyday

The old, damp basement was infested with spiders and silverfish.

2

Reports indicated that large areas of the forest were infested with a destructive beetle.

news/environment

Reports indicated that large areas of the forest were infested with a destructive beetle.

3

Ugh, my clothes drawer is infested with moths!

informal

Ugh, my clothes drawer is infested with moths!

4

The system was found to be infested with malware after the security breach.

technical/metaphorical

The system was found to be infested with malware after the security breach.

よく使う組み合わせ

infested with ants infested with ants
infested with rats infested with rats
infested with termites infested with termites
infested with mosquitoes infested with mosquitoes

よく使うフレーズ

infested with pests

infested with pests

a flea-infested bed

a flea-infested bed

termite-infested wood

termite-infested wood

よく混同される語

infested vs crowded

'Crowded' means full of people or things, but it's usually neutral or even positive (e.g., a crowded beach). 'Infested' specifically means filled with unwanted pests or creatures, implying a problem.

infested vs polluted

'Polluted' refers to the contamination of air, water, or land with harmful substances. 'Infested' refers to the presence of living organisms, usually pests, within an area.

文法パターン

Subject + be + infested + with + [noun phrase] The [noun phrase] was infested with [noun phrase]

How to Use It

📝

使い方のコツ

The word 'infested' is primarily used to describe a negative situation involving pests. It is generally used for animals or insects and implies a significant, problematic presence. While it can be used metaphorically, its core meaning relates to biological organisms causing a nuisance or harm.


⚠️

よくある間違い

A common mistake is using 'infested' for a small number of creatures; it implies a large, problematic population. Also, avoid using it for inanimate objects unless speaking metaphorically (e.g., 'infested with errors').

Tips

💡

Think Pests and Problems

Remember 'infested' when you want to convey a troublesome, large presence of unwanted creatures, especially pests.

⚠️

Avoid Overuse for Minor Issues

Don't use 'infested' for just one or two insects. It implies a significant, out-of-control problem.

🌍

Hygiene and Health Concerns

The term 'infested' often relates to public health and sanitation standards, highlighting potential risks.

📖

語源

The word 'infest' comes from the Latin 'infestare', meaning 'to attack' or 'to frequent'. It entered English around the 15th century, initially meaning to attack or harass, later evolving to its current meaning of being overrun by pests.

🌍

文化的な背景

In many cultures, cleanliness and the absence of pests are highly valued. An 'infested' home or environment can carry social stigma, suggesting poor hygiene or neglect.

🧠

覚え方のコツ

Imagine an 'ant' taking over your 'fest' (party). The place is 'ant-fest-ed' because it's full of ants!

よくある質問

4 問

An infestation typically involves a large number of insects (like ants, cockroaches, or termites), rodents (like rats or mice), or other pests. It can also sometimes refer to other unwanted organisms like weeds in a garden.

Yes, 'infested' always carries a negative connotation. It implies a problem that disrupts normal conditions, often related to health, cleanliness, or damage.

Yes, 'infested' can be used metaphorically to describe something being filled with undesirable elements, such as a computer 'infested' with viruses or a book 'infested' with errors.

'Full of' is a neutral term simply indicating quantity. 'Infested' specifically refers to an undesirable, problematic, and often large presence of creatures or pests.

自分をテスト

fill blank

Choose the best word to complete the sentence.

After weeks of neglect, the old pantry was discovered to be ______ with mice.

✓ 正解! ✗ おしい! 正解: a

'Infested' is the most appropriate word to describe a problematic and large presence of pests like mice.

multiple choice

Which sentence correctly uses the word 'infested'?

Which sentence uses 'infested' correctly?

✓ 正解! ✗ おしい! 正解: c

Sentence C correctly uses 'infested' to describe a problematic presence of rats, which are considered pests.

sentence building

Arrange the words to form a grammatically correct sentence using 'infested'.

Arrange: was / with / ants / kitchen / the / infested

✓ 正解! ✗ おしい! 正解: b

This sentence correctly identifies the location ('kitchen') and the pest ('ants') in the context of an infestation.

🎉 スコア: /3

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