On my list of favourite Ukrainian words, the word Милий (Mylyj) is just outside the list. Mostly because I spent quite a lot of time putting the list together before learning that word. But, when I re-visit the list, Милий is a strong candidate.
It is a warm and soft word, with the meaning of cute, sweet or kind. Which I think fits good.
Моя кішка мила
The example sentence means “My cat is cute”, or “My cute cat”. Pronounced “Moya kishka mylyj” (with the caveat is that it is not easy to write how things are pronounced in Ukrainian with latin letters. The letter и for instance is quite unique).