Alackaday
Pronunciation : A*lack"a*day`
Part of Speech : interj.
Etymology : [For alack the day. Cf. Lackaday.]
Definition : Defn: An exclamation expressing sorrow.
Note: Shakespeare has "alack the day" and "alack the heavy day." Compare "woe worth the day."
Source : Webster's Unabridged Dictionary, 1913
Merriam-Webster's Everyday Language Reference Set: Includes: The Merriam-Webster Dictionary, The Merriam-Webster Thesaurus, and The Merriam-Webster Vocabulary Builder