From en.wiktionary.org:
[rasen]
** German
*** Etymology
[de] From north-eastern [de], probably from [de], though the two could also be cognate forms. Further origin presumably a variant of [gml], from [de], from [de] which has been inherited as [de].[1]
The intermitting _r_ might be due to influence from dialectal forms of [de], notably [nds], [nds], [nds], [nds], [nds].[2]
*** Pronunciation
- [de] - [de]
*** Noun
[m]
1. lawn 2. turf
**** Declension
[m]
**** Derived terms
{{col4|de |Fußballrasen |Kunstrasen |Parkrasen |Rollrasen |Sportrasen |Stalinrasen |Rasenfläche |Rasenlänge |Rasenmäher |Rasenpflege |Rasenstück |Rasenfußball |Rasensport }}
*** References
References: [1]. [R:de:Pfeifer] [2]. [Wrasen]
*** Further reading
- [R:de:DWDS] - [R:de:UniLeipzig] - [R:de:Duden]