الطاقة منخفضة.

In Arabic, the present tense often does not use a separate word for is / are.

So:

• الطاقة منخفضة = The energy is low

There is an implied is, but Arabic usually leaves it out in simple present-tense statements like this.

If you wanted the past tense, you would usually add a verb, for example:

• كانت الطاقة منخفضة = The energy was low

الـ is the Arabic definite article, equivalent to the in English.

So:

• طاقة = energy / an energy
• الطاقة = the energy

Because the sentence is talking about a specific or understood energy, Arabic uses الـ.

Because الطاقة is a feminine noun, the adjective describing it must also be feminine.

Arabic adjectives agree with the noun in:

• gender
• number
• definiteness

Here:

• الطاقة = feminine singular definite
• منخفضة = feminine singular

The masculine form would be:

• منخفض

  So the feminine ـة at the end of منخفضة matches الطاقة.

A very common sign of a feminine noun in Arabic is the ending ـة called taa marbuuTa.

• طاقة

Even though it is written with ـة, in pause it is usually pronounced like -a or -ah, not like a full t sound.

So طاقة is grammatically feminine, and that is why the adjective must also be feminine: منخفضة.

In this sentence, منخفضة is the predicate adjective, not an attributive adjective inside a noun phrase.

There are two different patterns:

1. Predicate adjective

   • الطاقة منخفضة = The energy is low
   • The adjective usually does not take الـ

2. Attributive adjective

   • الطاقة المنخفضة = the low energy
   • Here the adjective is directly modifying the noun inside one noun phrase, so it matches in definiteness and takes الـ

So:

• الطاقة منخفضة = a full sentence
• الطاقة المنخفضة = a noun phrase

This is a very common Arabic sentence pattern:

• noun + adjective

More precisely, it is a nominal sentence:

• الطاقة = the subject
• منخفضة = the predicate

Arabic often uses this structure instead of subject + is + adjective.

So the pattern is:

• [noun] [describing word]
• الطاقة منخفضة

A careful pronunciation is approximately:

• aT-Taaqatu mun-khafiDa(tun) with full case endings
• In normal pause: aT-Taaqa mun-khafiDa

A few useful notes:

• الطاقة: the ل of الـ is not pronounced here because ط is a sun letter, so الطاقة sounds like aT-Taaqa
• ط is a heavy/emphatic t
• خ is like the ch in Scottish loch or German Bach
• ض is an emphatic consonant, often approximated by learners as a heavy d

In fully vowelled formal Arabic, it would typically be:

• الطاقةُ منخفضةٌ

That is:

• الطاقةُ = subject, so it takes ـُ in the nominative
• منخفضةٌ = predicate, also nominative

In everyday writing, these short vowels are usually omitted, so you normally see:

• الطاقة منخفضة

منخفض / منخفضة often means low in a broad sense, including levels, amounts, rates, or intensity.

So it can be used in contexts like:

• low energy
• low pressure
• low temperature
• low prices

It is not limited to physical height.

Depending on context, Arabic might also use other words for low, such as:

• قليل / قليلة = little, small in amount
• ضعيف / ضعيفة = weak
• منخفض / منخفضة = low, reduced, at a low level

So منخفضة works well when talking about a level being low.

Yes, but the meaning changes slightly.

• الطاقة منخفضة = The energy is low
• طاقة منخفضة = low energy or a low energy

Without الـ, it is usually not a complete definite statement about a specific thing. It sounds more like a general noun phrase.

So if you want a full sentence meaning The energy is low, الطاقة منخفضة is the natural form.

The final ـة is called taa marbuuTa.

It is usually pronounced:

• as -a / -ah when stopping at the end of a word
• as -at when the grammar or connection makes it audible

So:

• in pause: طاقة sounds like Taaqa
• in connected formal reading with case endings: الطاقةُ can sound like aT-Taaqatu

This is normal for many feminine nouns in Arabic.

Sometimes yes, depending on context.

طاقة can refer to things like:

• energy
• power
• capacity

So the best English translation depends on the situation.

For example:

• in a discussion about batteries or physics, energy may be best
• in a discussion about someone’s physical condition, energy is also natural
• in some technical contexts, power might fit, but often Arabic has other specific words for technical power

So the grammar of the sentence stays the same, but the exact English word can vary with context.