-oussuff 後缀 (with ns forming adjs 与名词结合构成形容词) having the qualities or character of 具有...性质或特徵的: poisonous mountainous * glorious. > -ously (forming advs 用以构成副词) grievously. -ousness (forming uncountable ns 用以构成不可数名词): spaciousness.
牛津英汉双解词典