The word "costpushes" is spelled as /kɒstˈpʊʃɪz/, with an initial "c" that represents the /k/ sound, followed by the vowels /ɒ/ and /ʊ/ that produce the "o" and "u" sounds, respectively. The consonant cluster "st" produces the /st/ sound, while the final "es" represents the third person singular present tense of the verb "push." Therefore, "costpushes" means to "push costs." It is important to use proper spelling, as it allows for clear and effective communication.