chulbaljieseo jeo deungsangaegege gati mureoboja.

No. In this sentence, 저 is a demonstrative determiner, meaning that.

• 저 등산객 = that hiker (over there)
• When 저 is used by itself as a pronoun, it can mean I/me in humble speech.
• But when it comes before a noun, it means that.

So here, 저 등산객 definitely means that hiker, not I, the hiker.

출발지 means starting point, departure point, or in context something like the trailhead/start area.

The particle 에서 is used because it marks the place where an action happens.

Here, the action is 물어보자 (let's ask), so 출발지에서 means:

• at the starting point
• from the starting point only in some contexts, but here the more natural reading is at the starting point

A useful contrast:

• 학교에 가다 = go to school
• 학교에서 공부하다 = study at school

In this sentence, the asking happens there, so 에서 makes sense.

에게 marks the person receiving the action, so here it marks the person being asked.

• 저 등산객에게 = to that hiker / that hiker

With verbs like 물어보다 (to ask), Korean often marks the person asked with:

• 에게 = standard/written-neutral
• 한테 = more conversational
• 께 = honorific

So these are similar:

• 저 등산객에게 물어보자
• 저 등산객한테 물어보자

Both mean basically the same thing, though 한테 sounds more casual in everyday speech.

Here, 같이 means together.

So 같이 물어보자 means let's ask together.

The natural interpretation is that the speaker is suggesting that the speaker and listener ask the hiker together.

It does not usually mean together with that hiker in this sentence. If you wanted that meaning, you would usually make it clearer with something like 저 등산객과 같이.

So in this sentence:

• 저 등산객에게 같이 물어보자 = let's ask that hiker together

물어보자 is the propositive form, meaning let's ask.

It comes from 물어보다, which is very commonly used for to ask / to inquire.

Breakdown:

• 묻다 = to ask
• 물어보다 = to ask, to try asking
• 물어보자 = let's ask

The -자 ending is used when the speaker proposes doing something together with the listener.

Examples:

• 가자 = let's go
• 먹자 = let's eat
• 물어보자 = let's ask

So the sentence has a suggestion tone, not a command.

Good question. 묻다 does mean to ask, so 묻자 is grammatically possible. But in everyday Korean, 물어보다 is extremely common when talking about asking someone something.

It often feels a bit more natural for actual conversational asking:

• 한번 물어보자 = let's ask
• 그 사람한테 물어봐 = ask that person

In many situations, 물어보다 is almost the default everyday choice. It can carry a slight sense of try asking, but very often it just functions as the normal verb ask.

So 물어보자 sounds very natural.

It is implied, not stated.

The ending -자 already tells you that the speaker means let's..., so the subject is understood as we:

• (우리) 출발지에서 저 등산객에게 같이 물어보자.
• At the starting point, let's ask that hiker together.

Korean often leaves out subjects when they are obvious from the context or from the verb ending.

So even though 우리 is not written, the meaning is still clearly we/us.

Because Korean often leaves out information that is already understood from the situation.

With 물어보다, the content of the question can be omitted if the context makes it clear.

For example, this sentence could mean things like:

• let's ask that hiker for directions
• let's ask that hiker which trail to take
• let's ask that hiker about the route

Korean does this a lot. If the speaker and listener already know what they need to ask, there is no need to state it.

It is casual/plain style because of -자.

That means it is appropriate when speaking to:

• friends
• someone close in age/status
• people you can speak casually with

If you wanted to say it more politely, you could say:

• 출발지에서 저 등산객에게 같이 물어봅시다.

That means the same thing, but with a more polite tone: Let’s ask that hiker together.

Not completely. Korean word order is fairly flexible because particles show each word’s role.

This sentence has:

• 출발지에서 = place where the action happens
• 저 등산객에게 = person being asked
• 같이 = together
• 물어보자 = let’s ask

You can move some parts around for emphasis, and the sentence can still be understood, for example:

• 같이 저 등산객에게 물어보자.
• 저 등산객에게 같이 물어보자.
• 출발지에서 같이 저 등산객에게 물어보자.

But the original order is natural and easy to follow.

Yes, it is grammatical and understandable. 출발지 means starting point/departure point.

That said, in a hiking context, native speakers might sometimes choose a more specific everyday expression depending on the situation, such as:

• 입구에서 = at the entrance
• 등산로 입구에서 = at the trail entrance
• 출발하는 곳에서 = at the place where we start

So 출발지에서 is fine, but whether it sounds perfectly natural depends on the exact context. It can sound a bit more general or situational than some more specific alternatives.