The spelling of the word "pearlest" can be explained through its phonetic transcription: /ˈpɜːrlɪst/. The use of the "-est" suffix indicates that it is a superlative form of "pearly", meaning resembling or having the luster of pearls. The "-l-" in "pearl" is represented by the letter "l" in "pearliest", which is followed by the "-i-" sound represented by the letter "i". The "-est" suffix is represented by the combination of the letters "e" and "st" at the end of "pearliest".
The word "pearlest" is derived from the base word "pearl", which refers to a smooth, lustrous, and typically white spherical deposition produced within the shell of a mollusk. The "-est" suffix in "pearlest" indicates the superlative form of "pearl", suggesting the highest degree or quality of being like a pearl.