Word: underclay
Part of speech: Noun
Syllables: un
der
clay
Definition: A stratum of clay lying beneath a coal bed.
Morphemes:
Affix: under-
Language: en
PoS: Prefix
Meaning: Under (in any sense): insufficient, insufficiently, below what is correct; subordinate to; beneath or behind.
Affix: clay
Language: en
PoS: Noun
Meaning: An earth material with ductile qualities.