दम्भस्त्वसतः स्वीयोत्तमत्वस्य व्यञ्जनम् ।
dambhas tv asataḥ svīyottamatvasya vyañjanam |
(Durgama-saṅgamanī-tīkā on Bhakti-rasāmṛta-sindhu: 2.4.194)
“‘Deceit’ (dambha) is making a show of one’s non-existent superiority [i.e., crooked conceited behavior].”