raresome

From rare +‎ -some.

raresome (comparative more raresome, superlative most raresome)

1. Characterised or marked by rareness
   • 1819, Catherine Hutton, Oakwood Hall:

     "A raresome fickle wife he'd a had," said one, "awliss a changing!"

   • 2015, Raja Rao, Collected Stories:

     And he became such a raresome success, that other women said: 'Shiv, if you came to me, you could have 10 per cent of it.'

• infrequent, scarce, uncommon; see also Thesaurus:rare