Wiktionary
undersexed
a. Lacking sufficient sexual desire or activity; sexually unfulfilled; sexually frustrated.
WordNet
undersexed
adj. having a subnormal degree of sexual desire
Usage examples of "undersexed".
It could be that he had been born undersexed, that that accounted for his self-acknowledged absorption with his business life.
Middle age had roughened her skin without wrinkling it, and as with most undersexed women there was much in her face that was male.