Word: underfiring
Part of speech: Noun
Syllables: un
der
fi
r
ing
Definition: The state of not burning fuel at the desired level, and thus not providing heat efficiently.
Morphemes:
Affix: under-
Language: en
PoS: Prefix
Meaning: Under (in any sense): insufficient, insufficiently, below what is correct; subordinate to; beneath or behind.
Affix: fire
Language: en
PoS: Verb
Meaning: To heat as with fire, but without setting on fire, as ceramic, metal objects, etc.
Affix: -ing
Language: en
PoS: Suffix
Meaning: Used to form gerunds, a type of verbal nouns, from verbs.