Noah Webster's Dictionary (a.) Not successful; not producing the desired event; not fortunate; meeting with, or resulting in, failure; unlucky; unhappy.

Multi-Version Concordance Unsuccessful (2 Occurrences) Philippians 1:22 But since to live means a longer stay on earth, that implies more labour for me--and not unsuccessful labour; and which I am to choose I cannot tell. (WEY) Deuteronomy 28:29 and you shall grope at noonday, as the blind gropes in darkness, and you shall not prosper in your ways: and you shall be only oppressed and robbed always, and there shall be none to save you. (See NIV)