Crossword Help

[Serpentine]

I've had this crossword sitting next to me for months now, and it's completely finished except for one word that I can't figure out. Assuming I got all the other words around it right, it is thusly:
?T?G?A?I?A?I*N
*I assume is O.
"Casting a slur upon."

What is it?

[Astrella]

Hmm, stigmatization could fit in there, but I'm not sure if it completely matches "casting a slur upon".

[Serpentine]

Hrm. It fits (although not as groundbreakingly "YES! That's it!" as I'd hope...), and I can't think of anything better, so... That'll do! Thank you :smallbiggrin: