Obtundent

• (n.) A substance which sheathes a part, or blunts irritation, usually some bland, oily, or mucilaginous matter; -- nearly the same as demulcent.
Found on http://thinkexist.com/dictionary/meaning/obtundent/

Obtundent

Ob·tund'ent noun [ Latin obtundens , present participle of obtundere .] (Medicine) A substance which sheathes a part, or blunts irritation, usually some bland, oily, or mucilaginous matter; -- nearly the same as demulcent . Forsyth.
Found on http://www.encyclo.co.uk/webster/O/7

obtundent

dulling
Found on http://phrontistery.info/o.html
No exact match found