Senses
上弦 first quarter moon
The moon phase during the eighth or ninth day of the lunar month when only the right half is visible.
上弦 to wind up
To tighten the spring of a clock, watch, or mechanical toy to make it run.
上弦 to string a bow
To tighten or attach a bowstring in preparation for shooting
上弦 to tune a string
To tighten the strings of a musical instrument such as a violin or guitar to achieve the correct pitch