I

This letter can represent one of two sounds:

1. When it's the only vowel in a word, it is pronounced as /ɪ/:

E.g.
bit, fit, hit, kit, mit, pit, sit, zit


2. It's always /ɪ/ when two consonants follow:

E.g.
sick
rich
ditch -> dich
to comit -> ta comitte
to convict -> ta convicte
permission -> permiss̃on
comission -> comiss̃on
citizen -> cittasan


3. When not stressed, it is pronounced as /ə/:

E.g.
individual -> indiviᶁual /ˌɪndəˈvɪdʒ(ə)wəl/


4. It is also stressed /ɪ/ in nouns ending in -ion:

E.g.
condition -> condicion
ambition -> ambicion
conviction -> conviccion
fiction -> ficcion
adiction -> adiccion
addition -> addicion


5. When a silent -e is at the end of the word, the letter is pronounced /i/.

E.g.
elite
meme -> mime
machine -> maçine
to see -> ta sihe
to repeal -> ta repile
to compete -> ta compite
to repeat -> ta repite
to defeat -> ta defite
complete -> complite

When -i is at the end of a word, it is also pronounced as /i/.

E.g.
recipe -> recipi
anemone -> anèmoni
catastrophe -> catàstrofi
hyperbole -> hypêrboli