Word: underclays
Part of speech: Noun
Syllables: un
der
clays
Definition: Plural of underclay. 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: Verb
Meaning: To add clay to, to spread clay onto.
Affix: -s
Language: en
PoS: Suffix
Meaning: Used to form many pluralia tantum (nouns that are almost or entirely without singular forms).