Diligent, Dogged, Enduring, Faithful, Fast, Firm, Fixed, Hubristic, Immutable, Imperturbable, Indefatigable, Indomitable, Industrious, Insistent, Invincible, Lasting, Loyal, Nerveless, Obstinate, Overconfident, Overweening, Patient, Permanent, Persevering, Persistent, Persisting, Persuaded, Pertinacious, Plodding, Plugging, Poised, Pompous, Positive, Predictable, Preoccupied, Proud, Rapt, Reassured, Relaxed, Relentless, Reliable, Resolute, Secure, Sleepless, Slogging, Solid, Sound, Stable, Steadfast, Steady, Stubborn, Substantial, Sure, Tenacious, Tireless, Unafraid, Unblinking, Unconquerable, Undaunted, Unfailing, Unflagging, Unflinching, Unhesitating, Uninterrupted, Abiding, Arrogant, Assiduous, Assured, Balanced, Calm, Cocksure, Confident, Constant, Continuing, Convinced, Cool, Decided, Determined, Unqualified, Unrelenting, Unremitting, Unshakable, Unshaken, Unshrinking, Unswerving, Untiring, Unwearied
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