# Indo-European s-mobile

> phenomenon where a Proto-Indo-European root appears to begin with an *s- which is sometimes but not always present

**Wikidata**: [Q1946063](https://www.wikidata.org/wiki/Q1946063)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Indo-European_s-mobile)  
**Source**: https://4ort.xyz/entity/indo-european-s-mobile


## References

1. Freebase Data Dumps. 2013