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 उपशम्
उपशम्upaśamTo calm, tranquillize.
To calm, tranquillize.
To appease, pacify, assuage, mitigate.
To extinguish, kill.
Derived forms and compounds
उपशम्upaśam
4 Parasmaipada
To become calm or quiet, be assuaged; उपशाम्यतु ते बुद्धिः Bk.2.5.
To cease, stop; अग्निः, शब्दः, कोपःetc.; cease to speak; K.11. -Causal