The word "junketter" is spelled with two "t's" because it follows the CVCVCV pattern, with two consonants followed by a vowel, then two more consonants and another vowel. The pronunciation of "junketter" is /ˈdʒʌŋkɪtə/ which can help to understand its spelling. The stress is on the first syllable, and it is pronounced with a "j" sound, followed by an "un" sound, then "kit," and ending with a short "uh" sound.
The term junketter is derived from the word junket, which originated in Middle English from the French word junque. Initially, junket referred to a dairy-based sweet dish or delicacy. Over time, the meaning of junket expanded to refer to a fancy feast or banquet. In the 19th century, the verb form junket emerged, meaning to travel or take a trip for pleasure or indulgence. Later, a person who participated in such indulgent trips came to be called a junketter.