dygðugr

a.

1) faithful, trusty (dygðugr maðr);

2) efficacious (dygðugt oleum).

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adj. ‘doughty,’ faithful, trusty; d. þjónusta, Fas. i. 90; d. maðr, Grett. 143 A, Th. 12: efficient, having virtue in them, of inanimate things, Stj. 99, 215.

β. in mod. eccl. writers, virtuous, good.