swastika
Concise Oxford English Dictionary © 2008 Oxford University Press:
swastika /ˈswɒstɪkə/
▶noun an ancient symbol in the form of an equal-armed cross with each arm continued at a right angle, used (in clockwise form) as the emblem of the German Nazi party.
– origin C19: from Sanskrit svastika, from svasti ‘well-being’, from su ‘good’ + asti ‘being’.
'swastika' also found in these Oxford entries:

