The correct spelling of the word "kotcheff" is "Kotcheff" and its IPA phonetic transcription is /ˈkɒtʃɛf/. The first vowel sound is pronounced as "ah" with the tongue low in the mouth, followed by a combination of consonants "tc" which has an aspirated "t" and a "ch" sound that is quickly produced. Then comes the short sound of "e" which is pronounced with the tongue slightly lifted and spreads to the sides of the mouth. Lastly, the word ends up with letter "f" which is pronounced with the lower lip touching the upper teeth.