Word: nightmare
Part of speech: Noun
Syllables: night
mare
Definition: A demon or monster, thought to plague people while they slept and cause a feeling of suffocation and terror during sleep.
Morphemes:
Affix: night
Language: en
PoS: Noun
Meaning: Darkness (due to it being nighttime).
Affix: mare
Language: en
Meaning: evil spirit believed to afflict a sleeping person