Where does “rockfill” come from?

rockfill (English) comes from English Rock, from English rock and roll, from English and, from Middle English an, from Old English ond, from Old English and, from Proto-Germanic andi, from Proto-Indo-European h₂énti — on, onto.

rockfill (English): A dam's embankment of compacted free-draining...

Definitions

  1. A dam's embankment of compacted free-draining...

Ancestry of “rockfill”, step by step

rockfill traces back through two separate lines of ancestry.

via English Rock

StepLanguageWordMeaning
1EnglishRockfor someone living near a rock or an oak (atter + oke)
2Englishrock and rollA genre of popular music that evolved in the...
3EnglishandAs a coordinating conjunction; expressing two...
4Middle EnglishanAlternative form of in; Alternative form of and;...
5Old Englishondand
6Old Englishandand; even; also
7Proto-Germanicandiin addition, furthermore, and
8Proto-Indo-Europeanh₂éntiopposite; near; in front
9Proto-Indo-Europeanh₂éntsforehead; front
10Proto-Indo-Europeanh₂ent-face; forehead; front
11Proto-Indo-Europeanh₂en-on, onto

via English Fill

StepLanguageWordMeaning
1EnglishFillTo make full
2Middle Englishfillento fill
3Old Englishfyllanto fill; Alternative form of fiellan
4Proto-West Germanic*fullijanto fill
5Proto-Germanicfullijanąto fill, to make full
6Proto-Germanicfullazfull; the whole, the entire
7Proto-Indo-Europeanpl̥h₁nósfull
8Proto-Indo-Europeanpleh₁-to fill
Every word from Proto-Indo-European h₂en-