besmirch /bi-smûrchˈ/

1. To soil, eg with smoke or dirt (literary)
2. To sully (a reputation, etc)

• authenticate
• authenticated
• authenticates
• authenticating
• authentication
• authentications
• authenticator
• authenticators
• authentic cadence
• authenticities
• authenticity
• author
• authorcraft
• authorcrafts
• authored
• authoress
• authoresses
• authorial
• authoring
• authorings
• authorisable
• authorisation
• authorise
• authorised
• authoriser