Unfulfilled or frustrated in the realization of one's ambitions or capabilities.
An artist manqué.
That falls short of the goal; unsuccessful or defective.
Potential but unrealized; would-be.
Origin of manque
- French from past participle of manquer to fail from Old French from Old Italian mancare from manco lacking from Latin mancus maimed, infirm man-2 in Indo-European roots
From American Heritage Dictionary of the English Language, 5th Edition
- Existing in English from the eighteenth century: from French manquÃ©, past participle form of manquer (“to lack, to be lacking in").