From Longman Dictionary of Contemporary Englishguardsmanguards‧man /ˈɡɑːdzmən $ ˈɡɑːr-/ noun (plural guardsmen /-mən/) [countable] PMAa soldier who is a member of a guard
Examples from the Corpus
guardsman• Try to walk into the room with good posture, though not like a guardsman on parade.• The Inquisitor was advancing in the vanguard of a squad of armoured imperial guardsmen.• Two of the Presidential guardsmen were giggling as they pointed to the name of the village that was his target.• The trio heard how the guardsman and other soldiers were drinking in the wine bar when Mr Clarkson passed.• The guardsmen in saurian leather and goggles, who manned this last of many checkpoints, stiffened.• Swinging his power sword and shouting to guardsmen, the Inquisitor pounded after the fugitive alien. 