雨下 is read as うか (uka) and means raining.
うか
uka
あめ
rain
あまみず
"rain water" solar term (approx. February 19)
うてん
rainy weather
あめあがり
after the rain
うちゅう
in the rain
うご
after rain
てんか
shogun (Edo period)
じょうげ
first and second volumes
としした
younger
かわしも
downstream
もと
under (guidance, supervision, rules, the law, etc.)
うえした
upside-down