If "tinker" refers to a person who repairs household goods:
* Gweithiwr: This means "worker" and is a general term for someone who performs manual labor.
* Sefyllwr: This translates to "repairer" and specifically refers to someone who fixes things.
If "tinker" refers to someone who travels around mending items:
* Cymro teithiol: This literally means "traveling Welshman" and could be used to describe a nomadic tinker.
* Llyfr-gylchwr: This means "book-binder," but could be used metaphorically for someone who mends things in general.
If "tinker" refers to the act of tinkering with something:
* Chwarae: This means "to play," and is a general term for messing around with something.
* Ffyddfio: This means "to fiddle" and refers to tinkering with something in a playful way.
Ultimately, the best Welsh equivalent for "tinker" will depend on the specific context and nuances of the situation.