Word: killer
Part of speech: Noun
Syllables: kill
er
Definition: That which causes stress or is extremely difficult, especially that which may cause failure at a task.
Morphemes:
Affix: kill
Language: en
PoS: Verb
Meaning: To cause great pain, discomfort or distress to.
Affix: -er
Language: en
Meaning: agent noun
Etymology Compounds: Affix: -ārius
Language: la
Decoded: -arius
PoS: Suffix
Meaning: -er; Used to form nouns denoting an agent of use, such as a dealer or artisan, from other nouns.