Helena is left confused and hurt by how ungentlemanly and unfriendly her closest comrades are.
Dean was dismissed from the service for ungentlemanly conduct.
If you did, it would be ungentlemanly, it would be improper.
This provoked newspaper headlines and widespread disapproval from his circle as an uncharacteristic act of ungentlemanly behaviour.
The devil refuses, says he could not take advantage of the man's disgusting and ungentlemanly drunken state.
In the early days of basketball, dunking was considered ungentlemanly, and was rarely used outside of practice or warm-up drills.
He becomes a little bitter, ungentlemanly in his conduct, someone else takes the young lady's side of the argument, and, sooner or later, there is a good deal of disturbance.
Now, to take alcohol to excess is not only very disgusting but very ungentlemanly.