昔者
xīzhě - in the past, once upon a time (adv)
周
Zhōu - personal name (n)
夢 (梦)
mèng - to dream (that) (transitive v); dream (n)
胡蝶
húdié - butterfly (n)
栩栩
xǔxǔ - to be lively (stative v)
喻
yù - to understand (transitive v)
適
shì - to satisfy (transitive v)
志
zhì - intentions, goals (n)
與 (与)
yú - (sentence final exclamatory or interrogative) (general particle); yǔ - and (nouns) (conj)
俄
é - to be sudden (stative v)
覺 (觉)
jué - to be conscious (stative v)
則 (则)
zé - then (conj); (contrastive topic marker) (general particle)
蘧蘧
qúqú - to be sudden (stative v)
必
bì - must, necessarily (adv)
分
fēn - distinction (n)
此
cǐ - this (n)
之謂
zhī wèi - is what is called (exp)
化
huà - transformation (n)