Definition of raritive in US English:

raritive

adjective

Grammar
rare
  • Of a word: relating to or denoting infrequency.

Origin

Mid 17th century; earliest use found in John Wilkins (1614–1672), theologian and natural philosopher. From rarit- + -ive, after frequentative.

Pronunciation

raritive

/ˈrɛːrɪtɪv/