名詞 pitter-patter:

1. a series of rapid tapping sounds

動詞 pitter-patter:

1. rain gently
   同義詞：sprinkle, spit, spatter, patter
2. make light, rapid and repeated sounds
   同義詞：patter

副詞 pitter-patter:

1. as of footsteps
   同義詞：pit-a-pat, pitty-patty, pitty-pat
2. describing a rhythmic beating
   同義詞：pit-a-pat, pitty-patty, pitty-pat

pit.ter-pat.ter

n.（名詞）
A rapid series of light, tapping sounds.
劈劈啪啪聲，卜卜聲：一系列快速的、連續(xù)的輕拍聲
v.intr.（不及物動詞）
pit.ter-pat.tered,pit.ter-pat.ter.ing,pit.ter-pat.ters
To make or move with a series of light, tapping sounds:
做卜卜聲，發(fā)出劈劈啪啪聲：發(fā)出快速的、連續(xù)的輕拍聲：
例句：
rain pitter-pattering on the roof.
雨點劈劈啪啪地打在屋頂上

來源：
[Imitative]
[擬聲詞]