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 जयनम्
जयनम्jayanamConquering, subduing.
[जि करणे ल्युट्]
Conquering, subduing.
Armour for cavalry, elephants etc.युज् caparisoned.