smudge · noun1
Derived from the verb (see below). Doublet of smutch.
smudge · verb2
- Middle English · inherited from*smogen
- English todaysmudge
From Middle English *smogen (attested in the gerund smogynge (“soiling, smudging”)), of obscure origin. Compare Middle English besmudded, bismuddet (“filthy”), Middle English smod (“filth, obscene behaviour”), Middle Dutch smoddich (“filthy, dirty”), German schmutzig (“dirty, filthy”).
Smudge · proper noun3
As smiths are often covered in smudges of soot.
Etymology from Wiktionary, CC BY-SA 4.0.