I am searching for an english word that means hard and soft all in one. almost like yin-yang but a catchy english version? Can anyone think of one - it will be the name of a martial arts studio.
There is a proverbial image that contrasts the rigid 'strength' of oak with the flexible strength of a reed (that bends with the wind). You could create a symbol depicting the oak and the reed - that might work as a sign for a martial arts studio.