rarefien

== Middle English == === Alternative forms === rarifien === Etymology === From Old French rarefier (modern French raréfier), from Latin rarefacere; equivalent to rare +‎ -ifien. === Pronunciation === IPA(key): /ˌrarɛˈfiːən/, /ˌraːrɛˈfiːən/ === Verb === rarefien (rare) To reduce; to lighten. ==== Conjugation ==== ==== Descendants ==== English: rarefy ==== References ==== “rārefīen, v.”, in MED Online, Ann Arbor, Mich.: University of Michigan, 2007.