kiss you
kishu
/ˈkɪʃu/Assimilation
In real speech
What happens to the sounds
s + y blend into “sh”: kiss you → “KISH-u”. Same as miss you → “MISH-u”.
When to use it
Happens in any fast speech, in any style. The spelling never changes.
Casual → formal
Neutral
kiss you
Sound notes
Assimilation: neighbouring sounds change each other, e.g. t + y → “ch”, d + y → “j”.