presumably /prɪˈzjuːməblɪ/ CET4 TEM4

• 1. 

  ADV If you say that something is presumably the case, you mean that you think it is very likely to be the case, although you are not certain. 很可能 [含糊]

  例：

  The spear is presumably the murder weapon.

  这矛很可能就是凶器。