The word "Wreathless" is spelled with the IPA phonetic transcription /ˈrɛθ.ləs/. The first syllable, "wreath," is spelled with a silent "w," followed by the vowel sound "eh" as in "bet" and the consonant sound "th" as in "bath." The second syllable, "less," is spelled with the vowel sound "e" as in "bed" and the consonant sound "s" as in "sit." This word is used to describe something that is without a wreath, such as a wreathless door or a wreathless holiday season.
Without a wreath.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.