Word: chummy
Part of speech: Noun
Syllables: chum
my
Definition: Nickname for a person, especially a suspect or criminal.
Morphemes:
Affix: chum
Language: en
PoS: Noun
Meaning: A friend; a pal.
Affix: -y
Language: en
PoS: Suffix
Meaning: Forming familiar names, pet names, nicknames and terms of endearment.