המדחום הראה שאין לי חום, אבל עדיין הרגשתי חלשה.

The ה־ at the beginning is the definite article, meaning the.

• מדחום = a thermometer
• המדחום = the thermometer

Hebrew attaches the directly to the noun, instead of writing it as a separate word.

הראה means showed.

It is the past tense, third person masculine singular form of the verb להראות (to show).

It matches the subject המדחום, because מדחום is a masculine singular noun in Hebrew. So literally:

• המדחום הראה = the thermometer showed

שאין is made from two parts:

• ש־ = that
• אין = there is not / there are not / do not have in certain structures

So שאין לי חום literally means something like:

• that there is no fever to me
• more naturally: that I didn’t have a fever / that I had no fever

This is a very common Hebrew structure.

Because possession in Hebrew is usually expressed with יש ל־ and אין ל־.

• יש לי חום = I have a fever
• אין לי חום = I do not have a fever

Literally, this works more like:

• there is to me
• there is not to me

So Hebrew does not normally say אני לא יש לי... for I don’t have...

לי means to me or for me, and in possession structures it corresponds to I have.

So:

• לי = to me
• יש לי = I have
• אין לי = I don’t have

Other examples:

• יש לה זמן = She has time
• אין להם כסף = They don’t have money

Yes — חום literally means heat, but it is also the normal word for fever.

So in this sentence:

• מדחום = thermometer
  literally something like heat-meter
• חום = fever

This is very natural in Hebrew. Compare:

• יש לי חום = I have a fever
• אין לי חום = I don’t have a fever

Because here חום is being used in a general, uncountable sense: fever.

Hebrew often leaves nouns without the definite article in this kind of expression:

• יש לי חום = I have a fever
• not normally יש לי החום

Using החום would usually sound like you are referring to a specific, already identified fever or heat, which is not what this sentence wants.

• אבל = but
• עדיין = still

So אבל עדיין means but still.

It shows contrast:

• the thermometer showed no fever,
• but still the speaker felt weak.

This is a very common combination in Hebrew.

Because הרגשתי is the first person singular past tense of להרגיש (to feel).

The ־תי ending is the key here:

• הרגשתי = I felt
• הרגשת = you felt (masc. singular)
• הרגישה = she felt

In the past tense, I forms in Hebrew usually end in ־תי.

Because חלשה is the feminine singular form of weak.

So this sentence implies that the speaker is female.

• חלש = weak (masculine singular)
• חלשה = weak (feminine singular)

A male speaker would say:

• ...אבל עדיין הרגשתי חלש.

This is a very common thing to notice in Hebrew: adjectives often reveal the gender of the speaker or subject.

In the past tense, the first person singular form is usually the same for both masculine and feminine.

So:

• הרגשתי can mean I felt said by a man
• הרגשתי can also mean I felt said by a woman

The gender only becomes clear from the adjective:

• הרגשתי חלש = a male speaker
• הרגשתי חלשה = a female speaker

Yes, that would be grammatical:

• הרגשתי שאני חלשה = I felt that I was weak

But the original הרגשתי חלשה is more direct and natural here.

Compare:

• הרגשתי חלשה = I felt weak
• הרגשתי שאני חלשה = I felt that I was weak

The shorter version is very common when describing physical or emotional states.

Yes, and it is very natural Hebrew word order.

Structure:

• המדחום = subject
• הראה = verb
• שאין לי חום = content clause, explaining what the thermometer showed

So literally:

• The thermometer showed that I had no fever

This kind of structure is common after verbs like said, thought, showed, knew, etc., where Hebrew often uses ש־ to introduce the following clause.

שאין is pronounced roughly she-ein.

Learners sometimes find it tricky because it looks compact on the page, but it contains two meaningful pieces:

• ש־
• אין

So when reading, it helps to mentally split it into:

• ש + אין

That makes the grammar much easier to understand.

It sounds completely natural and normal.

A native speaker could definitely say:

• המדחום הראה שאין לי חום, אבל עדיין הרגשתי חלשה.

It has standard everyday grammar and vocabulary. The only thing that changes in real life would be the speaker’s gender:

• female speaker: חלשה
• male speaker: חלש