# Best english stemmer in elasticsearch

**URL:** <https://discuss.elastic.co/t/best-english-stemmer-in-elasticsearch/201167>\
**Category:** Elasticsearch\
**Created:** [September 26, 2019, 7:25am UTC](https://discuss.elastic.co/t/best-english-stemmer-in-elasticsearch/201167 "2019-09-26T07:25:29Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![uhbnhy](https://avatars.discourse-cdn.com/v4/letter/u/8e7dd6/32.png) [@uhbnhy](https://discuss.elastic.co/u/uhbnhy)\
**Post date:** [September 26, 2019, 7:25am UTC](https://discuss.elastic.co/t/best-english-stemmer-in-elasticsearch/201167/1 "2019-09-26T07:25:29Z")

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what is the best english stemmer in elasticsearch?

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**Author:** ![Mark\_Harwood](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/mark_harwood/32/10538_2.png) [@Mark\_Harwood](https://discuss.elastic.co/u/Mark_Harwood)\
**Post date:** [September 26, 2019, 2:04pm UTC](https://discuss.elastic.co/t/best-english-stemmer-in-elasticsearch/201167/2 "2019-09-26T14:04:18Z")

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That's really a precision/recall question.

A stemmer that is good for recall is bad for precision and vice-versa so it depends on your objectives.  
Examples:

- precision is lost when an aggressive stemmer turns `AIDs` into `aid`.
- recall suffers when a less aggressive stemmer fails to turn `running` into `run`

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**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [October 24, 2019, 2:04pm UTC](https://discuss.elastic.co/t/best-english-stemmer-in-elasticsearch/201167/3 "2019-10-24T14:04:26Z")

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Closed on October 24, 2019, 2:04pm UTC

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