सहजं कर्म कौन्तेय सदोषमपि न त्यजेत्।सर्वारम्भा हि दोषेण धूमेनाग्निरिवावृताः
saha-jaṁ karma kaunteya sa-doṣham api na tyajet sarvārambhā hi doṣheṇa dhūmenāgnir ivāvṛitāḥ
The duty that falls to one's lot of its own accord should not be abandoned, though it may have its defects. All acts are marred by defects, just as fire is obscured by smoke.
Translated by Shri Purohit Swami
One should not, O Arjuna, abandon the duty to which one is born, though it may be faulty; for, all undertakings are enveloped by evil, just as fire is by smoke.
Translated by Swami Sivananda
Word meanings (from the gita/gita dataset)
saha-jam—born of one’s nature; karma—duty; kaunteya—Arjun, the son of Kunti; sa-doṣham—with defects; api—even if; na tyajet—one should not abandon; sarva-ārambhāḥ—all endeavors; hi—indeed; doṣheṇa—with evil; dhūmena—with smoke; agniḥ—fire; iva—as; āvṛitāḥ—veiled