大雨のあと、庭の一部が窪んで水たまりができた。
After the heavy rain, part of the garden sank and a puddle formed.
徹夜続きで彼の目はすっかり窪んでいた。
After several sleepless nights, his eyes were deeply sunken.
重い家具を置いていた所だけ床が少し窪んでいる。
The floor is slightly sunken just where the heavy furniture used to stand.