V. S. Apte, The Practical Sanskrit–English Dictionary. Look up any word of the Gita in Devanagari, IAST or Harvard-Kyoto, or browse the headwords letter by letter.
Entry अमङ्गल
अमङ्गलamaṅgalaल्य [lya], ल्य a.
ल्यlya, ल्यAdjective
Inauspicious, evil, ill; R.12.43; denotes that the rest of the word under consideration is to be suppliedअभ्यासरतिम् Ku.5.65; अमङ्गल्यं शीलं तव भवतु नामैकमखिलम् Puṣpadanta.
Unlucky, unfortune.
Derived forms and compounds
-लः The castor-oil tree (एरण्ड).
-लम् Inauspiciousness, ill-luck; evil; Often times used in dramatic literature; शान्तं पापं प्रतिहतम- मङ्गलम्; Compare God forbid.