can i say ktere dite je to? (sorry i have no accents on keyboard)
The text-to-speech is a little fuzzy. Try listening to recordings of actual humans here: https://forvo.com/search/kter%C3%BD/ - especially the longer ones like "o který my usilujeme". When people pronounce it in isolation, they tend to exaggerate the /k/ making it slightly aspirated which it shouldn't be.