BG 2.25
अव्यक्तोऽयमचिन्त्योऽयमविकार्योऽयमुच्यते। तस्मादेवं विदित्वैनं नानुशोचितुमर्हसि
avyakto ’yam achintyo ’yam avikāryo ’yam uchyate tasmādevaṁ viditvainaṁ nānuśhochitum arhasi
It is named the Unmanifest, the Unthinkable, and the immutable. Therefore, knowing the Spirit as such, you have no cause to grieve.
Translated by Shri Purohit Swami
This Self is said to be unmanifested, unthinkable, and unchangeable. Therefore, knowing this to be so, you should not grieve.
Translated by Swami Sivananda
Word meanings (from the gita/gita dataset)
avyaktaḥ—unmanifested; ayam—this soul; achintyaḥ—inconceivable; ayam—this soul; avikāryaḥ—unchangeable; ayam—this soul; uchyate—is said; tasmāt—therefore; evam—thus; viditvā—having known; enam—this soul; na—not; anuśhochitum—to grieve; arhasi—befitting