The official, complete app of Douglas Harper's Online Etymology Dictionary, with useful features to help you understand the origins of words as well as improve your vocabulary.

• From, the internet's top choice for quick, reliable, comprehensive yet comprehensible English word origins
• Instantaneous search with spelling suggestions works fast on your iPhones
• Offline Dictionary - find out word origins anytime, anywhere (Premium only)
• Universal app - works on your iPhones and iPads
• Related Words - easily access words that share the same origin/root. For example, you can check out all the words with root –logy, such as agriology, anthropology, biology, cardiology, choreology, Christology, chronology, cosmology, etc.

Get even more with ETYMONLINE PREMIUM:
• No Ads - Enjoy a calm, ad-free reading environment
• Offline dictionary - Search and view etymology without the need of an internet connection

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What’s New

Version 2.2.0

* XXL text fonts;
* Define: look up word using the iOS system's dictionary;
* Bug fixes and performance improvements.

Ratings and Reviews

4.9 out of 5
3K Ratings

3K Ratings

jum k ,


I am almost 50 and I remember as a kid quite often hearing, “ Look it up yourself in the dictionary and you will never forget it !”. Now enter the “Google Smart Age”, as I like to call it. I work with a lot of 20 somethings .... ask them anything... most of them literally have to “ google it”, to give you most answers. I asked this college kid at work the other day , the definition of “Hypocrite”.....he googled it came back with a simple definition. Then I showed him this site and we dug into that word and the roots of it , usage in language etc.... a few hours later this kid actually responded “ Wow... this site is Amazing... I feel as if I have the knowledge of this one word as good as my PHD English Teacher ... when I recently had a discussion with her about the word in class”..... what happened in our society over the last 40+ years not teaching kids how to Think !!!!... just an AWESOME SITE !!!

hb12ah ,

Not compatible with Dark Mode

First, bug report. When the dark mode is on, I won’t be able to see the texts in the search list because they are white. I can’t see the words in my bookmark list either for the same reason. The background should not be so bright in dark mode.

The content is great. The app is simple and intuitive, even though the subscription fee is too high in my opinion, so I’m not considering paying for it. Merriam-Webster charges $6 for each year. The content is already impressive, and the app is well designed. Please consider a one-time payment option. I will be happy to pay for it if that’s provided.

Developer Response ,

Hi, the dark mode problem has been solved in the latest version. Thanks for taking out time to rate us. It really helps us to keep going and delivering the best :) If you have any feedback or suggestion in the future, you could write to us at We would love to hear from you!

Thomas Hannahan ,

Get this app!

The search is fast and you cannot easily find this information while clumsily searching google. All the information is there to satisfy your curiosity. I particularly like the home page which has roots that are present in many words which allow you to greatly expand your vocabulary by learning the component roots of words. This way when you come across an unfamiliar word like pernicious you know that the roots per= for, toward and nec= death which gives you a good idea of what the word means. I think expanding your vocabulary in this way is great. Thanks!

Developer Response ,

Thank you very much for your love and the 5-star review!!! Please recommend etymonline to your friends. -The Etymonline Dev Team


崇伟 柳
108.1 MB

Requires iOS 9.0 or later. Compatible with iPhone, iPad, and iPod touch.


English, Simplified Chinese

Age Rating
In-App Purchases
  1. Etymonline Premium 12 Months $17.99
  2. Etymonline Premium 1 Month $4.99
  3. Etymonline Premium 6 Months $13.99


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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