What Does "prone to" Mean?
- Meaning: The collocation "prone to" indicates a natural tendency, inclination, or susceptibility toward something, usually something negative or undesirable such as an illness, a mistake, or a physical accident.
- Compositionality: It is semi-idiomatic. While "prone" historically means lying face down, in this context, it functions as an adjective describing a state of vulnerability.
- Register: Neutral to formal. It is frequently used in academic, medical, journalistic, and professional writing to describe patterns of behavior or physical properties.
How to Use It
- Grammatical pattern: The most common structure is [Subject] + [be/become/seem] + prone to + [Noun/Gerund].
- Typical objects: It is followed by nouns (e.g., "prone to accidents") or gerunds (e.g., "prone to oversleeping").
- Separability: Unlike some phrasal verbs, the components of this adjective phrase cannot be separated; "to" must immediately follow "prone."
- What sounds unnatural: Using it for positive traits usually sounds odd (e.g., "He is prone to winning" is rare; "He is prone to losing" is standard). Additionally, using a base verb (infinitive) instead of a gerund is a frequent error.
Real-World Examples
These examples are sourced from prone to on Ludwig.guru.
"They're prone to violence." — nytimes.com
"He was prone to hallucinations." — nytimes.com
"They are prone to bugs." — economist.com
"We build in places prone to flooding." — nytimes.com
"CAPITALISM is ever prone to cycles." — economist.com
Examples sourced from https://ludwig.guru/s/prone+to
Similar Phrases and Alternatives
| Phrase |
Context |
| susceptible to |
More formal; often used in medical or scientific contexts regarding diseases or influences. |
| inclined to |
Suggests a mental preference or a slight tendency; less focused on negative outcomes. |
| liable to |
Often implies a legal responsibility or a high probability of a specific risk occurring. |
| vulnerable to |
Emphasizes weakness or the lack of protection against a specific threat. |
| apt to |
More common in American English; suggests a habitual tendency in behavior. |
| tending to |
A neutral verbal alternative used to describe general patterns. |
Common Mistakes
- The "To-Infinitive" Trap: Learners often use the base form of the verb after 'to' instead of a gerund or noun (e.g., saying 'prone to fall' instead of 'prone to falling'). In this phrase, "to" is a preposition, not part of an infinitive verb.
- Wrong Preposition: Using "prone for" or "prone of" is incorrect; the adjective prone idiomaticallly requires the preposition to.
- Positive Connotation: Using it for positive achievements (e.g., "She is prone to excellence") sounds unnatural because the term typically carries a connotation of weakness or misfortune.
Quick-Reference Summary
| Expression |
Meaning |
Grammatical Pattern |
Register |
| prone to |
Likely to suffer from, do, or experience something (usually unpleasant) |
Adjective + Preposition (+ Noun/Gerund) |
Neutral to Formal |
FAQs
Can the words in prone to be separated by other words?
No, the adjective prone and the preposition to must stay together to maintain the meaning of susceptibility. You cannot place an object between them, though you may occasionally see an adverb modifying the adjective, such as in the phrase highly prone to.
What is the difference between prone to and susceptible to?
While very similar, prone to often describes a habitual behavior or a frequent occurrence, whereas susceptible to focuses more on a lack of immunity or defense. For example, a person is prone to making mistakes (habit) but susceptible to the flu (biological vulnerability).
Should I use a base verb or a gerund after the word to?
You should always use a noun or a gerund (the -ing form) because the "to" in this expression is a preposition. Learners often use the base form of the verb after 'to' instead of a gerund or noun, but saying prone to fall is grammatically incorrect compared to prone to falling.