dour

adjective

1. 1

   showing a brooding ill humor

   a dark scowl

   the proverbially dour New England Puritan

2. 2

   harshly uninviting or formidable in manner or appearance

   a dour, self-sacrificing life

   a forbidding scowl

3. 3

   stubbornly unyielding

   dogged persistence

   dour determination