偉い[erai] great
偉いですね[eraidesune] good!
偉い人[eraihito] celebrated personage
偉がる[eragaru] to be conceited
偉観[ikan] magnificent sight

偉挙[ikyo] excellent deeds
偉業[igyou] great enterprise
偉勲[ikun] great achievement
偉功[ikou] great deed