9 Grammatical Pitfalls
Old English wa, a common exclamation of lament in many languages (cf. Latin væ, Greek oa, German weh, Lettish wai, Old Irish fe, Welsh gwae, Armenian vay). The noun is attested from late 12c., from the interjection.
Excellent; great, tits, super
[1922+; first recorded in Sinclair Lewis, but afterwards chiefly British]