How to pronounce 谷底 in Cantonese (3 out of 4):

最後由於太一被戰鬥波及跌咗落谷底
And finally, the Tsai was hit by a wave of fighting and fell to the bottom of the valley.

Cantonese Sentence Breakdown

最後 zeoi3 hau6
last
由於 jau4 jyu1
because of
taai3
(adjective) (of generations) 1. Great-grand; (noun)
Great-grand mother or father; (Reduplication) "太太" =
wife; 2. Mrs.
jat1
one
single
a (article)
as soon as
entire
whole
all
throughout
"one" radical in Chinese characters (Kangxi radical 1)
also pr. [yāo] for greater clarity when spelling out numbers digit by digit
first (positional)
one part of a fraction, such as 'a' quarter, an eighth
a short duration (when used with a verb)
each
same
dedicated
from the start
pei5
quilt
blanket
(literary) to cover
戰鬥 zin3 dau3
(noun) Battle
波及 bo1 kap1
affect both
daat3
to drop
to fall
to tumble
Taiwan pr. [dié]
to stumple
to slip
to stamp
a fall
zo2
Cantonese particle equivalent to 了le [了] or 过guò [过], a particle used to indicate perfective aspect for continuous state
completed actions
past events
change of situation
lok6
to fall or drop
(of the sun) to set
(of a tide) to go out
to lower
to decline or sink
to lag or fall behind
to fall onto
to rest with
to get or receive
to write down
whereabouts
settlement
to deliver
to put in
谷底 guk1 dai2
bottom of the valley