Tsee-hoh-tsee-nehk
Here's a breakdown:
* C is pronounced like the "ts" in "cats"
* ie is pronounced like the "ee" in "see"
* cho is pronounced like "cho" in "chocolate"
* ci is pronounced like the "see" in "see"
* nek is pronounced like "neck"
So, the entire word is pronounced with a stress on the second syllable, making it sound like Tsee-hoh-tsee-nehk.