usin = blue (color) (adjective) (some things Google found for "usin": a common term; USIN stands for Universal Serial Item Names which are used as bibliographic identifiers; "usin'" is slang for English word "using"; a last name that can be Spanish or Estonian; a place in Nigeria)
Word derivation for "blue" :
Basque = urdin, Finnish = sininen (sini)
Miresua = usin
My previous word for "blue" was "ursein". For this revision, I dropped two letters. The "e" was in the Finnish "-nen" suffix.