一杯一杯
  いっぱいいっぱい
  adjectival nouns or quasi-adjectives (keiyodoshi)
  adverbial noun (fukushitekimeishi)
  noun (common) (futsuumeishi)
  one cup after another
  cup by cup
  to the limit
  to the fullest extent
  absolutely the limit
  the best one can do
  breaking even
  ◄ ►