Single-minded means fixed on one purpose to the exclusion of all else. Single-minded about the work.
It is praise and a warning at once, since what is excluded is usually everything else. A single-minded person achieves the thing and often loses the rest.
1adjectivesingle-mindedFixed on one purpose to the exclusion of all else.
“He was single-minded about the business for thirty years.”
single-minded is a quality.
Practised in A Song of Ice and Fire