frigidity: sexual unresponsiveness (especially of women) and inability to achieve orgasm during intercourse
unresponsiveness: the quality of being unresponsive; not reacting; as a quality of people, it is marked by a failure to respond quickly or with emotion to people or events
wyvern: a fire-breathing dragon used in medieval heraldry; had the head of a dragon and the tail of a snake and a body with wings and two legs