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How susceptible are you?

Q: I recently saw the phrase “susceptible to many interpretations.” Normally, I would use “of” as the preposition. Do you agree that it would be more fitting than “to”?

A: We think that either “of” or “to” is acceptable in that construction—“susceptible of many interpretations” or “susceptible to many interpretations.” Both phrases have been used by eminent writers, and as of 2008 the two versions were equally common in published books, according to Google’s Ngram viewer.

A survey of standard dictionaries shows no clear agreement here, but our impression is that a writer of British English would probably use the older “susceptible of” in this context, while an American might use either one.

Lexico, the former Oxford Dictionaries Online, is a good illustration of the British preference. It defines “susceptible of” as “capable or admitting of,” and gives these examples: “The problem is not susceptible of a simple solution” … “These things are not susceptible of translation into a simple ‘yes or no’ question” … “Each item separately may be susceptible of an innocent explanation.”

Another British guide, Fowler’s Dictionary of Modern English Usage (4th ed.), agrees, saying that “susceptible of” is “equivalent to ‘admitting or capable of.’ ”  Fowler’s gives these examples: “A passage susceptible of more than one interpretation” … “an assertion not susceptible of proof.”

On the American side, Merriam-Webster Unabridged says that “susceptible” in this sense is “used with of or to.” Here’s how M-W defines this use of “susceptible”: “of such a nature, character, or constitution as to admit or permit: capable of submitting successfully to an action, process, or operation.”

Merriam-Webster’s examples use both prepositions: “susceptible of proof” … “susceptible to solution” … “susceptible of being mistaken.”

Another US dictionary, American Heritage, also illustrates this sense of “susceptible” with both prepositions: “a statement susceptible of proof” … “a disease susceptible to treatment.”

However, one major American dictionary, Webster’s New World, is a hold-out for “susceptible of” in this sense. It says “susceptible of” means “that gives a chance for; admitting; allowing.” Its example: “testimony susceptible of error.”

All dictionaries agree that “susceptible” is used with “to” when it means easily affected or liable to be affected. Examples: “a man susceptible to her charms” … “a child susceptible to ear infections” … “a street susceptible to flooding” … “a boss susceptible to flattery.” (Memory aid: In that sense, “susceptible to” is much like “vulnerable to” or “subject to.”)

And all dictionaries agree that the adjective “susceptible” by itself—with no following preposition—usually means impressionable, emotionally sensitive, or easily moved by feelings. It’s often used to describe tender-hearted people. Examples: “the more susceptible in the audience were in tears” … “a susceptible young man is always falling in love” … “a movie too violent for susceptible children.”

In addition, the bare adjective is used to describe those likely to be affected by something, as in “distemper is deadly, and puppies are especially susceptible.”

As for its history, “susceptible” came into English in the early 17th century as a borrowing from the medieval Latin susceptibilis, according to the Oxford English Dictionary. The medieval term, which meant capable, sustainable, or susceptible, was derived from the classical Latin suscipĕre (to take up, support, or acknowledge).

The original meaning of “susceptible” was the one you ask about, “capable of undergoing, admitting of (some action or process).” Here’s the first OED example: “This Subiect of mans bodie, is of all other thinges in Nature, most susceptible of remedie” (Francis Bacon, Of the Proficience and Aduancement of Learning, 1605).

All of the dictionary’s examples for this sense of “susceptible” are accompanied by “of,” but they extend only to 1871 (the OED says its “susceptible” entry has not yet been fully updated).

However, we know that “to” had crept into use in American English by the mid-19th century. We’ve found more than a dozen examples of “susceptible to proof” in American newspapers of the 1800s, beginning with this one:

“Intimations, not perhaps susceptible to positive proof, have reached me that … [etc.]” (from a letter written Feb. 11, 1847, by the acting territorial Governor of California, Lieut. Col. John C. Frémont, and published Dec. 4, 1847, in the Boon’s Lick Times, Fayette, Mo.).

We’ve also found many American examples of “susceptible to interpretation” (since 1874), “susceptible to error” (since 1880), and “susceptible to mistakes” (since 1885). So in American English, the use of “susceptible to” in the sense we’re discussing is solidly established.

The more common meaning of “susceptible”—easily affected or liable to be affected—was first recorded in 1702. This sense was also accompanied by “of” originally, but the OED’s later examples have “to” (“susceptible to attack,” 1883; “susceptible to smallpox,” 1887, and so on).

The newcomer is the bare adjective, with no preposition. This “susceptible” was first recorded in 1709. These are the OED’s most recent examples of the different senses:

“We must remember also the susceptible nature of the Greek” (from Benjamin Jowett’s translation of Plato’s Dialogues, 2nd ed., 1875) … “By cultures and by inoculations into susceptible animals” (from A System of Medicine, edited by Thomas Clifford Allbutt, 1899).

Like us, you’re probably susceptible to fatigue, so we’ll stop here.

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