Она тоже растерялась и сказала, что нам нужно честно объясниться.

Because она means she, so the verb in the past tense must agree with a feminine subject.

• masculine: растерялся
• feminine: растерялась
• neuter: растерялось
• plural: растерялись

Russian past tense verbs show gender in the singular, which English verbs do not.

The base form is растеряться.

In this sentence, растерялась means something like:

• became confused
• got flustered
• lost her composure
• didn’t know what to do/say for a moment

It is a perfective verb, so it focuses on the change of state: she became confused, rather than simply was confused.

Тоже means also / too.

So Она тоже растерялась means She also got confused or She, too, became flustered.

Its position often comes after the word it relates to:

• Она тоже растерялась = She also got confused
• Она растерялась тоже is possible in some contexts, but less neutral here

In this sentence, тоже most naturally attaches to она: she too.

Что here means that and introduces a subordinate clause.

• сказала, что... = said that...

So:

• Она сказала, что нам нужно...
• She said that we need / had to...

In English, that is often optional. In Russian, что is much more commonly stated.

Because the pattern кому-то нужно + infinitive is very common in Russian.

Literally, нам нужно объясниться is closer to:

• To us, it is necessary to explain ourselves
• or more naturally: We need to talk things out

So нам is the dative case of мы:

• я → мне
• ты → тебе
• мы → нам
• они → им

This construction is one of the most common ways to say need to in Russian.

Нужно means necessary / needed / one must / need to, depending on context.

In нам нужно объясниться, it means:

• we need to explain ourselves
• we need to talk honestly
• we need to clear things up

It is an impersonal predicate, so Russian does not need a subject like it:

• Нужно идти. = It’s necessary to go / We need to go.

Because объясниться is a reflexive verb with a special meaning.

Compare:

• объяснить = to explain something
• объяснять = to be explaining / to explain regularly (imperfective)
• объясниться = to explain oneself / to have it out / to clear the air

In this sentence, they are not explaining an object like a rule or a problem. They are having an honest conversation to sort things out between themselves. That is why объясниться is the natural choice.

The -ся makes the verb reflexive, but reflexive verbs in Russian often develop meanings that are not literally reflexive in English.

Here объясниться does not mean simply to explain oneself in a mechanical sense. It often means:

• to talk things out
• to clear things up between people
• to have an honest explanation/conversation

So the -ся is essential: объяснить and объясниться are related, but they do not mean the same thing.

Because it describes how they need to explain themselves.

• честно = honestly
• честный = honest (adjective)

Here it modifies the infinitive объясниться:

• нужно честно объясниться = need to talk honestly / need to clear things up honestly

If you used честный, it would need to describe a noun, not a verb.

Объясниться is perfective.

That makes sense because the speaker means a single, complete act of clearing things up, not an ongoing process.

Compare:

• объясняться (imperfective) = to be explaining oneself / to have such conversations in general
• объясниться (perfective) = to clear things up once, to have the necessary talk

After нужно, both aspects can appear in Russian, but the choice depends on meaning. Here the idea is a definite conversation with a result, so perfective fits well.

Yes, Russian word order is flexible, and you might also hear:

• нам нужно честно объясниться
• нам честно нужно объясниться

But the first one is more neutral and clearer here.

With нужно честно объясниться, честно most naturally modifies объясниться: the conversation should be honest.

If you move words around, the emphasis can change, even if the basic meaning stays similar.

Yes. The sentence presents two past actions in sequence:

1. Она тоже растерялась — she also became confused/flustered
2. и сказала — and said
3. что нам нужно честно объясниться — that we need to talk things out honestly

This is very normal Russian narrative style: one past-tense verb, then another, then a что-clause with what was said.

Yes, it is natural and idiomatic.

Объясниться is a fairly common verb in situations involving relationships, misunderstandings, tension, or emotional honesty. So нам нужно честно объясниться sounds like:

• we need to have an honest talk
• we need to clear the air honestly
• we need to talk this through honestly

It has a somewhat serious, personal tone, especially in emotional or relationship-related contexts.

Yes.

Russian says:

• сказала, что нам нужно...

In English, depending on style and context, you might translate it as:

• she said that we need to talk honestly
• she said that we needed to talk honestly

Russian often keeps the present-tense idea after a past reporting verb where English may shift the tense back. Both translations can work, depending on context.