English smite and smith come from two different roots in PIE *smei- 'to smear, daub' and *smei 'to cut, work with a sharp tool', but cf. Old Icelandic smidr 'skilled worker in wood'. Whether these two roots are homonyms or a polysemous single root is arguable, but I'm sure old Pokorny had his reasons to separate them.

Ceci n'est pas un seing.