The spelling of the word "under habit" can be a bit confusing with its two silent letters. The first syllable, "un-," is pronounced as "ʌn," the schwa sound. The "d" in "under" is also silent, and the proper pronunciation is "ʌndɚ." The second syllable, "habit," is pronounced as "hæ-bɪt." Despite the spelling, the word is commonly pronounced as "ʌn-dɚ-hæ-bɪt," meaning something that is done regularly or subconsciously without conscious thought.