to all things and men I appertain and yet by some am shunned and distend. Fonder me and ogle me till your Insane ,but no blow can harm me cause me pain. Children delight in me ,elders take fright, fair maids rejoice and spin. Cry and I weep,yawn and I sleep,smile and I shall grin.

The answer is ME

http://www.reddit.com/r/witcher/comments/3qttq2/gaunter_odimm_full_riddle/

Reflection

Reflection is the only correct answer a mirror can be broken but a reflection cannot be broken or damaged

Reflection

Mirror or Reflection

werwer