BhG 18.32

syntax

he pārtha (O son of Pṛthā!),
tamasā (by darkness) yā āvṛtā [buddhiḥ] (which intelligence is covered) adharmam dharmam iti („lawlessness is the law”) manyate (it thinks),
sarvārthān ca viparītān (all things as reverse) [manyate] (it thinks),
sā buddhiḥ (that intelligence) tāmasī [asti] (is tamasic).

grammar

adharmam	–	adharma 2n.1 m. – lawlessness (from: √dhṛ – to hold);
dharmam	–	dharma 2n.1 m. – the law (from: √dhṛ – to hold);
iti	–	av. – thus (used to close the quotation);
yā	–	yat sn. 1n.1 f. – which;
manyate	–	√man (to think) Praes. Ā 1v.1 – it thinks;
tamasā	–	tamas 3n.1 n. – by darkness, gloom, dullness, passivity, one of the three guṇas (from: √tam – to choke, to faint, to perish, to stop);
āvṛtā	–	āvṛtā (ā-√vṛ – to cover) PP 1n.1 f. – covered;
sarvārthān	–	sarva-artha 2n.3 m.; sarvān arthān iti – all things (from: sarva – all, whole; √arth – to strive to obtain, to desire, to request artha – purpose, advantage, concern, object, wealth, use);
viparītān	–	viparīta (vi-pari-√xi – to turn round, to return) PP 2n.3 m. – reversed, wrong, contrary;
ca	–	av. – and;
buddhiḥ	–	buddhi 1n.1 f. – intelligence, thought, understanding, knowledge, idea, opinion (from: √budh – to wake, to perceive, to understand);
sā	–	tat sn. 1n.1 f. – that;
pārtha	–	pārtha 8n.1 m. – O son of Pṛthā (from: √pṛth – to extend, pṛthā – Kuntī, mother of the sons of Pāṇḍu);
tāmasī	–	tāmasī 1n.1 f. – pertaining to tamas, tamasic (from: √tam – to choke, to faint, to perish, to stop; tamas – darkness, gloom, dullness, passivity, one of the three guṇas);

textual variants

adharmaṁ dharmam iti → adharmyaṁ dharmyam iti (lawlessness is the law);
manyate → budhyate (he understands);
tamasāvṛtā → tamasānvitā / tamaso ‘nvitā (covered by darkness / because of darkness covered);
ca → tu (but);
sarvārthān viparītāṁś ca → sarvārtha-rūpa-retāṁś ca;
pārtha tāmasī → tāmasī matā (considered tamasic);

Śāṃkara

adharmaṃ pratiṣiddhaṃ dharmaṃ vihitam iti yā manyate jānāti tamasāvṛtā satī, sarvārthān sarvān eva jñeya-padārthān viparītāṃś ca viparītān eva vijānāti, buddhiḥ sā pārtha tāmasī

Rāmānuja

tāmasī tu buddhiḥ tamasāvṛtā satī sarvārthān viparītān manyate / adharmaṃ dharmaṃ, dharmaṃ cādharmaṃ, santaṃ cārtham asantam, asantam cārthaṃ santaṃ, paraṃ ca tattvam aparam, aparaṃ ca tattvaṃ param / evaṃ sarvaṃ viparītaṃ manyata ity arthaḥ

Śrīdhara

tāmasīṃ buddhim āha adharmam iti | viparīta-grāhiṇī buddhis tāmasīty arthaḥ | buddhir antaḥkaraṇaṃ pūrvoktam | jñānaṃ tu tad-vṛttiḥ | dhṛtir api tad-vṛttir eva | yad vā antaḥkaraṇasya dharmiṇo buddhir apy adhyavasāya-lakṣaṇā vṛttir eva | icchā-dveṣādīnāṃ tad-vṛttīnāṃ bahutve ‚pi dharmādharma-bhayābhaya-sādhanatvena prādhānyād etāsāṃ traividhyam uktam | upalakṣaṇaṃ caitad anyāsām

Viśvanātha

yā manyata iti | kuṭhāraś chinattītivat yayā manyata ity arthaḥ

Baladeva

tāmasīṃ buddhim āha adharmam iti | viparīta-grāhiṇī buddhis tāmasīty arthaḥ | sarvārthān viparītāni sādhum asādhum asādhuṃ ca sādhuṃ, paraṃ tattvam aparam aparaṃ ca tattvaṃ param ity evaṃ sarvān arthān viparītān manyata ity arthaḥ