How to pronounce 羅馬帝國 in Cantonese (5 out of 6):

當時羅馬帝國嘅皇帝德西烏斯
The Roman Emperor Decius was the first to do so.

Cantonese Sentence Breakdown

當時 dong1 si4
back then
羅馬帝國 lo4 maa5 dai3 gwok3
Roman Empire
koi3
indignant
generous
to sigh (with emotion)
皇帝 wong4 dai3
(noun) King
dak1
virtue
goodness
morality
ethics
kindness
favor
character
kind
German
a surname
the Tak group, a sub-group of the 14K triad gang
西 sai1
west
western
occident
foreign
a surname
abbreviation for Spain
westwards
a pawn-ticket
cunt
wu1
a crow
black
dark
a surname
what
how
when
si1
(phonetic)
this
a surname
then