Word: underbreath
Part of speech: Adverb
Syllables: un
der
breath
Definition: Under one's breath; inaudibly or in a barely audible manner.
Morphemes:
Affix: under-
Language: en
PoS: Prefix
Meaning: Under (in any sense): insufficient, insufficiently, below what is correct; subordinate to; beneath or behind.
Affix: breath
Language: en
PoS: Verb
Meaning: misspelling of breathe.