Word: backfill
Part of speech: Noun
Syllables: back
fill
Definition: The material that has been used to refill an excavation.
Morphemes:
Affix: back
Language: en
PoS: Noun
Meaning: The roof of a horizontal underground passage.
Affix: fill
Language: en
PoS: Noun
Meaning: Soil and/or human-created debris discovered within a cavity or cut in the layers and exposed by excavation; fill soil.