Bhagavad Gita · Sankhya YogaChapter 2, Shloka 71 (2.71)

Four "nir-"s: niḥspṛha (no craving), nirmama (no sense of "mine"), nirahaṅkāra (no ego) — and the giving up of all desires.

Shankaracharya — a picture of the sannyasi. yaḥ saṃnyāsī pumān … carati jīvana-mātra-ceṣṭā-śeṣaḥ paryaṭati — the sannyasi who moves about with only the effort needed to sustain life.

• Niḥspṛha — no craving even for mere bodily survival.
• Nirmama — no insistence that "this is mine" even about the few things he must keep to sustain the body.
• Nirahaṅkāra — vidyāvattvādi-nimittātma-saṃbhāvanā-rahitaḥ — free of thinking himself great because of learning and the like. Notice — Shankara specifically mentions the pride of learning.
• Śānti — sarva-saṃsāra-duḥkhoparama-lakṣaṇāṃ nirvāṇākhyām — the end of all worldly sorrow, nirvana; brahma-bhūto bhavati — he becomes one with Brahman.

Ramanujacharya: kāmāḥ = sense objects such as sound. One who gives up all sense objects, free of craving for them, free of "mine", and anātmani dehe ātmābhimāna-rahitaḥ — not holding the conceit of "I" in the body (which is not the self) — he sees the self and attains peace. For Ramanuja the main meaning of "nirahankara" is freedom from the confusion of body and self — the teaching of 2.11–2.30 brought into practice.