The spelling of the word "brickest" can be explained using the International Phonetic Alphabet (IPA) transcription. The word is pronounced as /ˈbrɪkɪst/, with the stress placed on the first syllable. The letter "b" represents the voiced bilabial plosive consonant, followed by the "r" which is a voiced alveolar trill consonant. The "i" sound is represented by the phoneme /ɪ/, while the "c" and "k" sounds represent the voiceless post-alveolar affricate /tʃ/ and voiceless velar plosive /k/ respectively. The final "st" represents the voiceless alveolar plosive /st/.