Word: rockfill
Part of speech: Noun
Syllables: rock
fill
Definition: A dam's embankment of compacted free-draining granular earth, often containing rocks, with an impervious zone.
Morphemes:
Affix: rock
Language: en
PoS: Noun
Meaning: A mass of stone projecting out of the ground or water.
Affix: fill
Language: en
PoS: Noun
Meaning: An embankment, as in railroad construction, to fill a hollow or ravine; also, the place which is to be filled.