dis-, dys-

Although these prefixes are homonyms, they are not interchangeable.

The etymology of the prefix dis- comes from Latin, with an original meaning of apart. It’s root word, dwis, is related to duo and to bis, with a meaning of two ways. Today, the prefix dis- means opposite or opposite of.

The etymology of dys- comes from Ancient Greek, with an original meaning of bad, evil, ill. Today, the prefix  dys- means bad, ill; hard, difficult; or abnormal, imperfect.

Do not hyphenate after the prefix in most cases. For hyphenation rules, see hyphen.

← Return to Chapter D

User feedback survey

Please take a moment to tell use how you use the OAJ Style and Accessibility Guide.

Open survey
How I describe my profession. (Required)

Select as many as apply.

Where I work. (Required)

Select as many as apply.

How I use the OAJ Style and Accessibility Guide. (Required)

Select as many as apply.

How often I use the OAJ Style and Accessibility Guide. (Required)

Select only one.

Other guides I use. (Required)

Select as many as apply.

The information given within the Feedback Form will be used for service improvement only and are strictly confidential.

Thank you for your participation!

Didn’t find what you need?

Try searching the Style and Accessibility Guide in the box below

Donations build this guide

The Style and Accessibility Guide is built, maintained and free to use because people like you have generously donated to this project. Consider giving $5 a month — or any amount you choose.