The correct spelling for the word "laughed up" is /læft ʌp/. The word is made up of the verb "laugh" and the preposition "up". The phonetic transcription for "laugh" is /læf/. This word is pronounced by starting with the "l" sound, moving to the short "a" vowel sound, then ending with the "f" sound. When "up" is added to "laugh", it forms a phrasal verb that means to laugh excessively or in a delighted manner.