The word "kilcrease" is spelled with a "k" followed by "il," which represents the /ɪ/ sound. The next part of the word, "cre," is pronounced with the long "e" sound /iː/. The final part of the word, "ase," is pronounced with the long "a" sound /eɪ/. Together, these sounds form the word "kilcrease" which means to increase in size or amount by one thousand. The proper spelling of this word is important for clear communication and effective writing.