from The American Heritage® Dictionary of the English Language, 4th Edition
- interj. Used to express woe or distress.
- n. A lamentation.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- interj. Expressing sadness, regret etc.
from The Century Dictionary and Cyclopedia
- An exclamation expressive of grief or sorrow, equivalent to alas.
- n. Woe; misery.
Middle English, alteration (influenced by well, well and awai, away) of Old English weilāwei, alteration (influenced by Old Scandinavian *wei, woe) of wā lā wā : wā, woe; see woe + lā, lo; see lo.(American Heritage® Dictionary of the English Language, Fourth Edition)
Old English weġ lā weġ, alteration of wā lā wā, with substitution of Old Norse vei for Old English wā. Compare wellawo, weila. (Wiktionary)