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 उपजन
उपजनupajana1 Addition, increase.
1 Addition, increase.
Appendage.
Rise, origin.
Addition of a letter in the formation of words; उपजन आगमः Mbh. on Śiv. Sū.5. वर्णdenotes that the rest of the word under consideration is to be supplied Nir.
Any letter, syllable or affix so added; अनर्थका उपजनाः Nir.