rare1

 
Pronunciation: /rɛː/

adjective (rarer, rarest)

  • (of an event, situation, or condition) not occurring very often: a rare genetic disorder [with infinitive]: it’s rare to see a house so little altered
  • (of a thing) not found in large numbers and so of interest or value: one of Britain’s rarest birds, the honey buzzard
  • unusually good or remarkable: he plays with rare sensitivity

Derivatives

rareness

noun

Origin:

late Middle English (in the sense 'widely spaced, infrequent'): from Latin rarus