上弦

to wind / to tighten / crescent moon / first quarter or waxing moon

to wind up a watch, clockwork toy etc / to tighten the string of a bow, violin etc / first quarter (phase of the moon)

used in 上聲|上声[shang3 sheng1]

(bound form) up; upper; above; previous / first (of multiple parts) / to climb; to get onto; to go up / to attend (class or university) / (directional complement) up / (noun suffix) on; above

bow string / string of musical instrument / watchspring / chord (segment of curve) / hypotenuse / CL:根[gen1]

first quarter moon