rarefy
         v 1: lessen the density or solidity of; "The bones are rarefied"
         2: make more subtle or refined [syn: {rarefy}, {sublimate},
            {subtilize}]
         3: weaken the consistency of (a chemical substance) [syn:
            {rarefy}, {attenuate}]

English Dictionary: Rorippa	by the DICT Development Group
From WordNet (r) 3.0 (2006) [wn]:
rarify v make more complex, intricate, or richer; "refine a design or pattern" Synonym(s): complicate, refine, rarify, elaborate
From WordNet (r) 3.0 (2006) [wn]:
roar off v leave; "The car roared off into the fog"
From WordNet (r) 3.0 (2006) [wn]:
Rorippa n annual and perennial herbs of damp habitats; cosmopolitan except Antarctica Synonym(s): Rorippa, genus Rorippa
From Webster's Revised Unabridged Dictionary (1913) [web1913]:
Rarefy \Rar"e*fy\, v. i.       To become less dense; to become thin and porous. [bd]Earth       rarefies to dew.[b8] --Dryden.
From Webster's Revised Unabridged Dictionary (1913) [web1913]:
Rarefy \Rar"e*fy\, v. t. [imp. & p. p. {Rarefied}; p. pr. & vb.       n. {Rarefying}.] [F. rar[82]fier; L. rarus rare + -ficare (in       comp.) to make; cf. L. rarefacere. See {-fy}.]       To make rare, thin, porous, or less dense; to expand or       enlarge without adding any new portion of matter to; --       opposed to condense.
From The Free On-line Dictionary of Computing (15Feb98) [foldoc]:
RARP          {Reverse Address Resolution Protocol}