1. dogged, dour, persistent, pertinacious, tenacious, unyielding

stubbornly unyielding

Example Sentences:
'dogged persistence'
'dour determination'
'the most vocal and pertinacious of all the critics'
'a mind not gifted to discover truth but tenacious to hold it'
'men tenacious of opinion'

Synonyms

• dogged
• persistent
• pertinacious
• tenacious
• unyielding

Similar Words

• obstinate
• stubborn
• unregenerate

2. dour, forbidding, grim

harshly uninviting or formidable in manner or appearance

Example Sentences:
'a dour, self-sacrificing life'
'a forbidding scowl'
'a grim man loving duty more than humanity'
'undoubtedly the grimmest part of him was his iron claw'

Synonyms

• forbidding
• grim

3. dark, dour, glowering, glum, moody, morose, saturnine, sour, sullen

showing a brooding ill humor

Example Sentences:
'a dark scowl'
'the proverbially dour New England Puritan'
'a glum, hopeless shrug'
'he sat in moody silence'
'a morose and unsociable manner'
'a saturnine, almost misanthropic young genius'
'a sour temper'
'a sullen crowd'

Synonyms

• dark
• glowering
• glum
• moody
• morose
• saturnine
• sour
• sullen