without a wink of the eyelid
まばたき一つせずに
without any difficulty
何の困難もなしに（with no difficulty）．
without any trouble
難なく，たやすく
without argument
異議なく
without authority from ...
…の許可なく
without authorization from ...
…の許可なく
without bias and without favor
公平無私に
without breaking (one's) stride
つかえずに
without breaking (a) sweat
汗ひとつかかずに（楽々と）
without cause
しかるべく理由なく
