Short i makes the /i/ sound. Like:

igloo inchworm

insect

Here are some words with the short i vowel:

hit fit sick hip mix

fin Rick sit pick lip

X at the end of a word makes the /ks/ Sound. Like…

mix fox

Here are some words with final x:

mix fix fox box six

Wax tax

ip

As in lip

it

As in hit

ick

As in stick

ix

As in mix