下弦

third quarter or waning moon

last quarter, aka third quarter (phase of the moon)

down / downwards / below / lower / later / next (week etc) / second (of two parts) / to decline / to go down / to arrive at (a decision, conclusion etc) / measure word to show the frequency of an action

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

third quarter moon, aka last quarter moon

third quarter or waning moon