BG 18.35
यया स्वप्नं भयं शोकं विषादं मदमेव च।न विमुञ्चति दुर्मेधा धृतिः सा पार्थ तामसी
yayā svapnaṁ bhayaṁ śhokaṁ viṣhādaṁ madam eva cha na vimuñchati durmedhā dhṛitiḥ sā pārtha tāmasī
And that which clings perversely to false idealism, fear, grief, despair, and vanity is the product of ignorance.
Translated by Shri Purohit Swami
That firmness, O Arjuna, by which a stupid man does not abandon sleep, fear, grief, despair, and conceit, is Tamasic.
Translated by Swami Sivananda
Word meanings (from the gita/gita dataset)
yayā—in which; svapnam—dreaming; bhayam—fearing; śhokam—grieving; viṣhādam—despair; madam—conceit; eva—indeed; cha—and; na—not; vimuñchati—give up; durmedhā—unintelligent; dhṛitiḥ—resolve; sā—that; pārtha—Arjun, the son of Pritha; tāmasī—in the mode of ignorance