The spelling of the word "tribular" can be confusing due to the irregularities of the English language. According to the International Phonetic Alphabet (IPA), "tribular" is spelled /ˈtrɪbjʊlər/. The "t" is pronounced as a voiceless alveolar stop, the "r" as an alveolar approximant, and the "u" as a short stressed vowel. The letters "b" and "l" are pronounced as voiced bilabial and voiced alveolar consonants, respectively. The pronunciation of "tribular" is crucial in usage and comprehension of this word.