Word: underfilling
Part of speech: Noun
Syllables: un
der
fill
ing
Definition: The underneath structure of a building.
Morphemes:
Affix: under-
Language: en
PoS: Prefix
Meaning: Under (in any sense): insufficient, insufficiently, below what is correct; subordinate to; beneath or behind.
Affix: fill
Language: en
PoS: Noun
Meaning: Inexpensive material used to occupy empty spaces, especially in construction.
Affix: -ing
Language: en
PoS: Suffix
Meaning: Used to form uncountable nouns from various parts of speech denoting materials or systems of objects considered collectively.