All 18 Uses of

steadfast
in
The Iliad by Homer (translated by: Lang, Leaf, & Myers)

Son of Atreus, do thou still, as erst, keep steadfast purpose and lead the Argives amid the violent fray; and for these, let them perish, the one or two Achaians that take secret counsel—to depart to Argos first, before they know whether the promise of aegis-bearing Zeus be a lie or no. Yea, for I say that most mighty Kronion pledged us his word that day when the Argives embarked upon their fleet ships, bearing unto the Trojans death and fate; for by his lightning upon our right he manifested signs of good.†
Book 2

steadfast = firmly consistent

Then stalwart Diomedes looked sternly at him and said: "Speak to me no word of flight, for I ween that thou shalt not at all persuade me; not in my blood is it to fight a skulking fight or cower down; my force is steadfast still.†
Book 5

And steadfast goodly Odysseus answered him: "Most noble son of Atreus, Agamemnon king of men, he yonder hath no mind to quench his wrath, but is yet more filled of fury, and spurneth thee and thy gifts.†
Book 9

steadfast = firmly consistent

Then him again answered the steadfast noble Odysseus: "Son of Tydeus, praise me not overmuch, neither blame me aught, for thou speakest thus among the Argives that themselves know all.†
Book 10

To the son of Tydeus did Thrasymedes steadfast in war give a two-edged sword (for his own was left by his ship) and a shield, and about his head set a helm of bull's hide, without cone or crest, that is called a skull-cap, and keeps the heads of stalwart youths.†
Book 10

Asaios first, and Autonoos, and Opites, and Dolops, son of Klytios, and Opheltios, and Agelaos, and Aisymnos, and Oros, and Hipponoos steadfast in the fight; these leaders of the Danaans he slew, and thereafter smote the multitude, even as when the West Wind driveth the clouds of the white South Wind, smiting with deep storm, and the wave swelleth huge, rolling onward, and the spray is scattered on high beneath the rush of the wandering wind; even so many heads of the host were smitten by Hector.†
Book 11

Nay, maugre the deathless gods was it builded, wherefore it abode steadfast for no long time.†
Book 12

While Hector yet lived, and yet Achilles kept his wrath, and unsacked was the city of Priam the king, so long the great wall of the Achaians likewise abode steadfast.†
Book 12

The horse-hair crests on the bright helmet-ridges touched each other as they nodded, so close they stood each by other, and spears brandished in bold hands were interlaced; and their hearts were steadfast and lusted for battle.†
Book 13

And the charioteer was amazed, and kept not his wits, as of old, and dared not turn his horses and avoid out of the hands of foemen; and Antilochos the steadfast in war smote him, and pierced the middle of his body with a spear.†
Book 13

And as he was slowly departing, Deiphobos aimed at him with his shining spear, for verily he ever cherished a steadfast hatred against Idomeneus.†
Book 13

But the Lokrians followed not with the high-hearted son of Oileus, for their hearts were not steadfast in close brunt of battle, seeing that they had no helmets of bronze, shadowy with horse-hair plumes, nor round shields, nor ashen spears, but trusting in bows and well-twisted slings of sheep's wool, they followed with him to Ilios.†
Book 13

And whatsoever man is steadfast in battle, and hath a small buckler on his shoulder, let him give it to a worse man, and harness him in a larger shield.†
Book 14

Moreover his left shoulder was wearied, as steadfastly he held up his glittering shield, nor yet could they make him give ground, as they pressed on with their darts around him.†
Book 16

And Hector hurled at Automedon with his bright spear, but he looked steadfastly on the bronze javelin as it came at him and avoided it, for he stooped forward, and the long spear fixed itself in the ground behind, and the javelin-butt quivered, and there dread Ares took away its force.†
Book 17

But he denied them steadfastly, and sware moreover an oath: "Nay, verily by Zeus, who is highest and best of gods, not lawful is it that water should come nigh my head or ever I shall have laid Patroklos on the fire, and heaped a barrow, and shaved my hair, since never again shall second grief thus reach my heart, while I remain among the living.†
Book 23