(n.) a day or one day; (slang) used as part of a prepositional phrase (一日都係) to blame someone (or something or 'a reason') for some negative things that have happened, all because of; owing to; thanks to (e.g. 一日都係你 means "It's all because of you" or "Thanks to you".)
都
dou1
all
both
entirely
(used for emphasis) even
already
(not) at all
metropolis
capital
big city
the whole
elegant
refined
without exception
also
too
still
used in a sentence to add an inference or interrogative tone
唔會
m4 wui2
would not; not possible
悶
mun6
bored
depressed
melancholy
sealed
airtight
tightly closed
gloomy
in low spirits
stuffy
to cover tightly
to keep silent
㗎
gaa3/ gaa4
sentence-final particle, contraction of "嘅呀" (Cantonese), to express doubt
reservation
emphasis
disapproval
see also 嘅kài [嘅]
Learn Stroke Order
See how to write "悶" with stroke-by-stroke animation