In plain words
Taking refuge in ahaṅkāra, power, arrogance, desire, and anger, these envious people hate Me in their own bodies and in the bodies of others.
Word for word
Resorting to ahaṅkāra, force, arrogance, desire and anger, hating Me in their own and others' bodies, [they are] envious.
अहङ्कारं बलं दर्पं कामं क्रोधं च संश्रिताःमामात्मपरदेहेषु प्रद्विषन्तोऽभ्यसूयकाः
Other commentaries
The commentators
▸Bhagavadgītābhāṣyam· bhāṣya
अहङ्कारं अहङ्करणम् अहङ्कारः, विद्यमानैः अविद्यमानैश्च गुणैः आत्मनि अध्यारोपितैः ‘विशिष्टमात्मानमहम्’ इति मन्यते, सः अहङ्कारः अविद्याख्यः कष्टतमः, सर्वदोषाणां मूलं सर्वानर्थप्रवृत्तीनां च, तम् । तथा बलं पराभिभवनिमित्तं कामरागान्वितम् । दर्पं दर्पो नाम यस्य उद्भवे धर्मम् अतिक्रामति सः अयम् अन्तःकरणाश्रयः दोषविशेषः । कामं स्त्र्यादिविषयम् । क्रोधम् अनिष्टविषयम् । एतान् अन्यांश्च महतो दोषान् संश्रिताः । किञ्च ते माम् ईश्वरम् आत्मपरदेहेषु स्वदेहे परदेहेषु च तद्बुद्धिकर्मसाक्षिभूतं मां प्रद्विषन्तः, मच्छासनातिवर्तित्वं प्रद्वेषः, तं कुर्वन्तः अभ्यसूयकाः सन्मार्गस्थानां गुणेषु असहमानाः ॥ १८ ॥
In plain words
'Egotism' -- literally, the making of 'I' -- happens when qualities you actually have, and qualities you don't, both get projected onto the Self, and you end up thinking, 'I am someone special.' That is egotism: a form of ignorance, and the most punishing one there is, the root of every fault and every harmful thing a person ever does. Likewise, 'aggression' -- force aimed at overpowering others, fueled by craving and attachment. 'Insolence' -- it gets its name from exactly this: whenever it arises, a person crosses the line of what's right; it's a specific flaw that lives in the mind. 'Lust' -- desire fixed on women and the like. 'Anger' -- hostility toward whatever isn't wanted. Clinging to these and other serious faults -- and more than that, they hate Me, the Lord who lives in their own body and in every other body too, silently witnessing every thought and act -- and that hatred simply means defying My law. Living that way, they become people who can't stand to see goodness in anyone, envious of the virtues of those who walk the honest path.
Close to the Sanskrit
'Ahankara' -- 'ahankarana' means egotism -- by qualities existing and non-existing, superimposed upon the Self, one thinks 'I am a distinguished self' -- that is egotism, called ignorance, the most troublesome, the root of all faults and of all activity leading to harm -- that [egotism]. Likewise, 'force' -- having as its motive the overpowering of others, accompanied by desire and passion. 'Insolence' -- insolence is the name for that in whose arising one transgresses dharma -- this is a particular fault residing in the inner organ. 'Desire' -- having women and the like as its object. 'Anger' -- having the undesired as its object. Relying on these and other great faults; moreover, hating Me, the Lord, present in one's own body and in others' bodies as the witness of the intellect and actions [of each] -- 'hatred' meaning the transgressing of My ordinance -- doing that, they are fault-finders, unable to bear the virtues of those established on the good path.