The phrase "letted it come" is a variant of the more commonly used phrase "let it come". The word "letted" is the past tense of the verb "let", which means to allow or permit. The pronunciation of "letted" is /ˈlɛtɪd/, with the stress on the first syllable and a long "e" sound. In some dialects, the spelling "letted" is used instead of "let" in the past tense. However, this spelling is considered non-standard and is rarely used in modern English.