- persistent in effort; stubbornly tenacious: a dogged worker.
- obstinately determined; wilful or tenacious
“having the qualities of a dog” (mostly in a negative sense), c.1300, from dog (n.). Meaning “persistent” is from 1779. Hence doggedly (late 14c.), “cruelly, maliciously;” later “with a dog’s persistence” (1773). Related: Doggedness.