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Synonyms for

“tough”

6 synonyms and better words for “tough,” each with its precise meaning and an example so you pick the one that actually fits, not just the nearest match.

tenacious

/tə-ˈneɪ-ʃəs/Elevated

Holding firm against adversity with stubborn, unyielding persistence.

“She was tenacious enough to rebuild the company after three devastating setbacks.”

Best for: Works well in professional or admiring contexts; slightly elevated but widely understood.

indomitable

/ɪn-ˈdɒm-ɪ-tə-bəl/Literary

Impossible to subdue or defeat, radiating unconquerable inner strength.

“His indomitable spirit carried him through years of hardship without breaking.”

Best for: Best for heroic or inspirational writing; carries a grand, almost epic tone.

steely

/ˈstiː-li/Punchy

Coldly resolute and unyielding, like the hard edge of tempered metal.

“She fixed him with a steely gaze and refused to budge an inch.”

Best for: Punchy and vivid; great for tense scenes or describing fierce determination.

obdurate

/ˈɒb-djʊ-rɪt/Rare Gem

Stubbornly resistant to persuasion or softening, hardened against all appeal.

“The obdurate negotiator refused every compromise offered across the table.”

Best for: Literary and slightly cold in tone; best for characters who are tough to the point of harshness.

adamantine

/ˌæd-ə-ˈmæn-tɪn/Rare Gem

Unbreakably hard and unyielding, like the legendary impenetrable substance of myth.

“Her adamantine resolve outlasted every attempt to wear her down.”

Best for: Rare and poetic; draws from classical mythology and suits elevated or literary prose.

iron-willed

/ˈaɪ-ərn-wɪld/Punchy

Possessing a will so strong it bends under no pressure or persuasion.

“The iron-willed commander marched her troops forward through impossible terrain.”

Best for: Vivid compound adjective; punchy and immediate, works in action-driven or journalistic writing.

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