Compound words using 'one' are onesided (argument), onedimensional (flat), onetime (as a modifier).

just tell him. theres really no other way

It is not clear whether or not they will in the series yet. Karin seems to have a big role later in the story for her escaping prison, so who knows, we might have something sasukarin related in the future, onesided or not.

I beleave it's worth around the same as mine. Igave 95 dollars for mine and it does have proof barrel marks. also it has onesided T and a quarter drop down,after the 1915,

If it's a woman telling you that you are the "perfect woman", that may not mean much. If it's a guy telling you that, then stop dating others, and start dating him!