UNDERSEXED
Meaning of UNDERSEXED in English
un ‧ der ‧ sexed /ˌʌndəˈsekst◂ $ -ər-/ BrE AmE adjective
having less desire to have sex than is normal OPP oversexed
Longman Dictionary of Contemporary English.
Longman - Словарь современного английского языка.
2012