direct immediate irreversible monadal monadic one-piece one-sided one-way straight straightaway straightforward straightway unbroken undeviating uniangulate unibivalent unibranchiate unicameral unicellular unicuspid unidentate unidigitate unidimensional uniflorous unifoliate unifoliolate unigenital uniglobular unilateral unilinear uniliteral unilobed unilobular unimodular unimolecular uninterrupted uniocular unipart unipartite unipolar univalent univocal unswerving