efface

Short definition from Wiktionary

Verb

1. 1
   To erase (as anything impressed or inscribed upon a surface); to render illegible or indiscernible.
2. 2
   To cause to disappear as if by rubbing out or striking out.
3. 3
   To make oneself inobtrusive as if due to modesty or diffidence.
4. 4
   Of the cervix during pregnancy, to thin and stretch in preparation for labor.
5. 5
   Of a woman: to have the cervix thin and stretch in this manner.