sinraidekiru tanmatu de saisetteiyoumeeruadoresu wo kakuninsuru.

信頼できる means trusted, trustworthy, or more literally can be trusted.

It is built from:

• 信頼 = trust
• できる = can do / be able to

So literally, 信頼できる is can be trusted.

Here it directly modifies 端末, so:

• 信頼できる端末 = a trusted device

This is a very common pattern in Japanese:

• 使用できる端末 = a device that can be used
• 信用できる人 = a person who can be trusted

Japanese often uses verb-based expressions where English might prefer an adjective.

So instead of a single adjective meaning trustworthy, Japanese commonly says:

• 信頼できる = can be trusted

This sounds natural and standard. It functions like an adjective when placed before a noun:

• 信頼できる端末 = trusted device

So even though できる is a verb, the whole phrase works like an adjective here.

In practice, it can suggest both, but in a tech/security context it usually means:

• a trusted device
• a device already recognized as safe/reliable for the account

So this is less about the device having a good moral character, and more about it being an approved or familiar device.

In English, trusted device is probably the best translation in this kind of sentence.

端末 literally means terminal, but in modern tech Japanese it often means:

• device
• smartphone
• tablet
• computer
• client device

So in this sentence, 端末 is best understood as device.

Depending on context, it could refer to:

• your phone
• your laptop
• another logged-in device

で marks the place or means by which an action is done.

So:

• 信頼できる端末で = on a trusted device / using a trusted device

Here, で tells you the action 確認する happens by means of that device.

Compare:

• 端末で確認する = check on a device
• 学校で勉強する = study at school
• ペンで書く = write with a pen

So で here is very natural.

Because に and で do different jobs.

• で = where/by what means an action happens
• に = destination, target, time point, existence location, etc.

In this sentence, the device is the place/means used to perform the checking, so で is correct:

• 信頼できる端末で確認する = check on a trusted device

If you used に, it would sound unnatural here because the device is not the destination of the action.

This is a noun compound. It breaks down as:

• 再設定 = reset / reconfiguration / setting again
• 用 = for use in / intended for
• メールアドレス = email address

So:

• 再設定用メールアドレス = email address for resetting
• more naturally: reset email address or email address used for account reset

The 〜用 pattern is very common:

• 仕事用のパソコン = a computer for work
• 子ども用 = for children
• 確認用コード = code for confirmation

So 再設定用 means for reset purposes.

Because 確認する is a transitive verb here, and を marks its direct object.

So the thing being checked is:

• 再設定用メールアドレス

That gives:

• 再設定用メールアドレスを確認する = check/confirm the reset email address

This is a very standard pattern:

• 内容を確認する = check the contents
• 名前を確認する = confirm the name
• 設定を確認する = check the settings

確認する usually means:

• confirm
• check
• verify

In interface or instruction language, it often means check and make sure.

So here it does not necessarily mean a formal verification process. It can simply mean:

• look at it and confirm it is correct
• review it

In many UI contexts, 確認する is softer and more routine than a heavy English word like verify.

Because Japanese basic word order is often Subject–Object–Verb, and the verb normally comes at the end.

So this sentence is arranged like:

• 信頼できる端末で = on a trusted device
• 再設定用メールアドレスを = the reset email address
• 確認する = check/confirm

This is completely normal Japanese sentence structure.

The dictionary form is very common in:

• menu items
• button labels
• instructions
• headings
• step descriptions

So 確認する can feel like:

• Check
• Confirm
• To confirm
• Confirming

In a full polite sentence, you might see:

• 確認します = will confirm / confirm
• 確認してください = please confirm

But in app and website language, the plain dictionary form is often used because it is short and neutral.

It is omitted, which is very common in Japanese.

The sentence does not explicitly say you, but in context it is understood as an instruction to the user:

• (あなたが) 信頼できる端末で再設定用メールアドレスを確認する。

In natural English, you would usually supply the subject:

• Check the reset email address on a trusted device.

Japanese often leaves out subjects when they are obvious from context.

No. They are almost certainly added for readability or study purposes.

Normally this would be written as:

• 信頼できる端末で再設定用メールアドレスを確認する。

Japanese usually does not use spaces between words the way English does.

So if you see the spaced version, it is usually because:

• it is for learners
• it is from a teaching tool
• it is formatted for clarity in a UI or document