Word: underlay
Part of speech: Noun
Syllables: un
der
lay
Definition: A layer (of earth, etc.) that lies under another; substratum.
Morphemes:
Affix: under-
Language: en
PoS: Prefix
Meaning: Under (in any sense): insufficient, insufficiently, below what is correct; subordinate to; beneath or behind.
Affix: lay
Language: en
PoS: Noun
Meaning: A layer; a relatively thin sheetlike expanse or region lying over or under another