Reliably means “in a way you can trust, again and again.” If a bus runs reliably, you can plan your morning on it. If a friend shows up reliably, you are not guessing whether they will come. If a machine or a test works reliably, you get a steady result, not a wild new answer each time.

Reliably means “in a way you can trust, again and again.”Reliably 意思是「一次又一次都值得信賴的那種方式」。If a bus runs reliably如果一班公車 runs reliably（很可靠地行駛）， you can plan your morning on it你就可以靠它安排早上的行程。If a friend shows up reliably如果一個朋友 shows up reliably（很可靠地出現）， you are not guessing whether they will come你就不用猜他們到底會不會來。If a machine or a test works reliably如果一台機器或一個測驗 works reliably（很可靠地運作）， you get a steady result你得到的會是穩定的結果， not a wild new answer each time而不是每次都冒出個亂七八糟的新答案。

The person or thing is reliable; they act reliably — one word names what they are, the other names how they behave. You hear it a lot with services, tools, memory, and people who do not let you down.

The person or thing is reliable那個人或那樣東西本身是 reliable（可靠的）； they act reliably他們的行為是 reliably（可靠地）—— one word names what they are一個字說的是他們是什麼樣的人／東西， the other names how they behave另一個字說的是他們表現出來的樣子。You hear it a lot你會常常聽到這個字用在 with services, tools, memory, and people who do not let you down服務、工具、記憶力，還有不會讓你失望的人身上。

Though actually, I can reliably say is a grown-up, slightly careful way of saying “I am quite sure,” as if your knowledge itself can be depended on. That is a stretch from buses and friends to the speaker’s own claim.

Though actually不過其實， I can reliably sayI can reliably say 這種說法 is a grown-up, slightly careful way of saying “I am quite sure,”是一種比較成熟、稍微謹慎的方式，用來說「我相當確定」， as if your knowledge itself can be depended on好像你的知識本身也是可以依靠的一樣。That is a stretch這是一種延伸用法， from buses and friends從公車和朋友那種用法， to the speaker’s own claim延伸到說話者自己所講的話上。