היא נשמעת בטוחה, אבל אני יודעת שהיא קצת עייפה.

That’s a very common question.

The root ש־מ־ע is indeed related to hearing. But the form נשמעת comes from the נפעל pattern, and in this kind of sentence it often means is heard / sounds.

So:

• היא שומעת = she hears / is hearing
• היא נשמעת = she sounds / is heard

In this sentence, היא נשמעת בטוחה means she sounds confident.

Literally, it is something like she is heard as confident, but in natural English we say she sounds confident.

Because they all refer to היא, which means she.

Hebrew words often agree in gender with the person they describe.

Here:

• היא נשמעת — the verb form is feminine singular
• בטוחה — feminine singular adjective
• היא קצת עייפה — feminine singular adjective again

If the subject were masculine, you would get:

• הוא נשמע בטוח
• הוא קצת עייף

So the feminine endings here are not random; they match היא.

Because אני does not show gender by itself, but the verb/adjective with it does.

So:

• a female speaker says אני יודעת = I know
• a male speaker says אני יודע = I know

This is very important in Hebrew: first-person singular אני can refer to either a man or a woman, and the surrounding form tells you which one it is.

So this sentence tells us that the speaker is female.

The ש is the Hebrew word that, attached directly to the next word.

So:

• שהיא = that she

In the sentence:

• אני יודעת שהיא קצת עייפה

this means:

• I know that she is a little tired

Hebrew very often attaches ש־ directly to the following word instead of writing it as a separate word.

Because in present-tense Hebrew, you usually do not say a separate word for am / is / are.

So:

• היא עייפה = she is tired
• אני עייפה = I am tired
• הם עייפים = they are tired

There is no present-tense copula in normal Hebrew sentences like these.

But in past and future, Hebrew does use forms of להיות:

• היא הייתה עייפה = she was tired
• היא תהיה עייפה = she will be tired

So the absence of is here is completely normal.

קצת means a little, a bit, or somewhat.

So:

• קצת עייפה = a little tired / a bit tired

Putting קצת before the adjective is the normal, natural order.

Compare:

• היא קצת עייפה = natural
• היא עייפה קצת = possible in speech, but less neutral and more marked

So if you just want to say a little tired, קצת עייפה is the best default choice.

Yes.

The adjective בטוח / בטוחה can mean:

• sure
• certain
• confident
• sometimes safe/secure, depending on context

In this sentence, היא נשמעת בטוחה most naturally means she sounds confident or she sounds sure of herself.

Context tells you which English word fits best.

For example:

• אני בטוחה שזה נכון = I’m sure that this is correct
• היא נראית בטוחה בעצמה = She looks confident

Yes, in normal Hebrew you do.

The second clause needs its own subject:

• אני יודעת = I know
• שהיא קצת עייפה = that she is a little tired

So היא is doing real grammatical work there. Without it, the sentence would feel incomplete or ungrammatical in standard Hebrew.

English also keeps the subject here: I know that she is a little tired.

They are usually pronounced approximately like this:

• נשמעת = nishma'at
• יודעת = yoda'at

The ע in modern Israeli Hebrew is often very weak, and many speakers barely pronounce it as a strong consonant. But it can create a slight break between vowels.

That is why learners often hear:

• nishma-at
• yoda-at

rather than one smooth syllable.

Also, the final ת in these feminine forms is pronounced as t in modern Hebrew.

Both things can change.

If the speaker were male but still talking about a woman:

• היא נשמעת בטוחה, אבל אני יודע שהיא קצת עייפה.

If the person being talked about were male, and the speaker were female:

• הוא נשמע בטוח, אבל אני יודעת שהוא קצת עייף.

If both were male:

• הוא נשמע בטוח, אבל אני יודע שהוא קצת עייף.

So Hebrew marks gender in several places at once:

• the subject pronoun
• the present-tense verb form
• the adjective

That is why these small ending changes matter so much.