The correct spelling is A-C-C-E-S-S-I-B-L-E

Accessible has two C's and two S's. The word comes from the Latin root "accedere," meaning "to approach," which is why both the C and S are doubled. A common mistake is spelling it with one C or one S — "accesible" or "accessable" — but both are wrong.

In tech writing and policy, this word appears constantly because it describes whether software, websites, documents, and devices work for people with disabilities. Getting the spelling right matters because misspelled versions look unprofessional in job applications, technical documentation, and any writing about inclusive design. If you work in tech, accessibility compliance, or user experience, you will encounter this word regularly enough that the correct spelling becomes automatic.

The word breaks down into three parts: the prefix "ac-" (meaning "to"), the root "cess" (meaning "go" or "approach"), and the suffix "-ible" (meaning "able to be"). Remembering that "cess" has two S's helps lock in the spelling. Once you understand where each letter comes from, the word stops feeling arbitrary.

Key Takeaways

  • The correct spelling is A-C-C-E-S-S-I-B-L-E with two C's and two S's, not one of each.
  • Common misspellings include "accesible" (one S) and "accessable" (wrong suffix), both of which are incorrect.
  • In tech and policy contexts, this word describes whether products work for people with disabilities, so correct spelling signals attention to detail.
  • The word comes from Latin "accedere" (to approach), which explains why both the C and S are doubled.
  • Spell-checkers catch most misspellings, but knowing the correct spelling yourself is useful when writing in text fields that lack spell-check.

Why the double letters trip people up

English has many words where doubling consonants changes meaning or follows Latin roots, but the pattern is not always obvious. Words like "access" (the noun or verb) have two C's and two S's, so "accessible" (the adjective form) keeps both doublings. But "possible" has one S, which makes people second-guess themselves when adding the prefix "ac-".

The brain also tends to simplify doubled letters when reading or writing quickly. You see "accessible" and your mind might register it as "accesible" because one S feels like enough. Slowing down and writing it out letter by letter — or using spell-check — catches this before it reaches a document that matters.

Another reason the spelling confuses people is that "-able" is a more common suffix in everyday English than "-ible." Words like "comfortable," "reasonable," and "enjoyable" all use "-able," so when you are forming an adjective, "-able" feels natural. But Latin-derived words typically use "-ible," and "accessible" is one of them.

Common misspellings and what they look like

The most frequent errors are:

  • Accesible (one S in the middle) — missing the second S from the root
  • Accessable (wrong suffix) — using "-able" instead of "-ible"
  • Accessibile (too many letters) — adding an extra I
  • Accesable (both errors combined) — one S and the wrong suffix

If you are writing in a word processor like Microsoft Word or Google Docs, the spell-checker will flag all of these. But if you are writing in a text field on a website, in a quick message, or in a document that does not have spell-check enabled, you might not have that safety net. This is why knowing the correct spelling yourself matters, especially if you write about accessibility regularly.

How to remember the spelling

One reliable method is to think of the word "access" first — A-C-C-E-S-S — and then add "-ible" to the end. Since "access" already has two C's and two S's, you are not adding anything unusual; you are just extending a word you may already know how to spell. This works because "access" is a common word that most people spell correctly.

Another approach is to break it into syllables: ac-CES-si-ble. Saying it out loud with emphasis on the "CES" part helps your brain register both the C and the S. Some people also write it out once or twice by hand when learning it, which engages muscle memory and makes the spelling stick faster.

If you write about accessibility (the noun form of the same concept) regularly, you will internalize the spelling quickly. Both words share the same root, so learning one reinforces the other. After a few weeks of using the word correctly, you will stop thinking about the spelling and it will become automatic.

Accessible in tech and policy writing

In technology, "accessible" describes whether a website, app, document, or device works for people with disabilities. This includes screen reader compatibility, keyboard navigation, captions for video, color contrast for people with low vision, and many other features. When you see phrases like "WCAG accessibility standards" or "accessible design," the word is doing real work in the sentence and refers to specific, measurable qualities.

Because this word appears in job postings, technical specifications, legal compliance documents, and company mission statements, spelling it correctly signals that you understand the topic and take it seriously. A resume that says "I have experience with accessable design" reads as careless, even if the rest of your qualifications are strong. In professional contexts, correct spelling builds credibility.

Frequently Asked Questions

Is it "accessible" or "accessable"?

It is "accessible" with the suffix "-ible," not "-able." The word comes from the Latin root "accedere," and English words derived from Latin typically use "-ible" (like "possible," "terrible," "horrible"). The "-able" suffix is more common in words from French or Germanic roots, which is why it feels natural but is incorrect here.

Why does "accessible" have two C's?

The two C's come from the prefix "ac-" (meaning "to") plus the root "cess" (from Latin "cedere," meaning "to go"). When you combine them, you get "ac" + "cess" = "access," which is why both the C and S are doubled. Adding "-ible" keeps both doublings intact.

What is the noun form, and how do you spell it?

The noun form is "accessibility," spelled A-C-C-E-S-S-I-B-I-L-I-T-Y. It follows the same pattern as the adjective — two C's and two S's — with the addition of the "-ity" suffix. Both words share the same root, so if you can spell "accessible," you can spell "accessibility."

Does spell-check catch misspellings of this word?

Yes, most spell-checkers in word processors and email clients will flag "accesible," "accessable," and other common errors. However, spell-check does not work in all text fields on websites, so knowing the correct spelling yourself is still useful when you are writing in places without that safety net.

How do I use "accessible" in a sentence?

Use it as an adjective to describe something that works for people with disabilities: "This website is accessible to screen reader users" or "The company redesigned their app to make it more accessible." You can also use the noun form: "Accessibility is a legal requirement for government websites."