Word: pattering
Part of speech: Verb
Syllables: pa
tter
ing
Definition: Present participle of patter; rain gently
Morphemes:
Affix: pat
Language: en
PoS: Verb
Meaning: To gently rain.
Affix: -er
Language: en
Meaning: frequentative 
Affix: -ing
Language: en
PoS: Suffix
Meaning: Used to form present participles of verbs.