بعد التعقيم، الحيوان الاليف لازم يرتاح.

Because Arabic often uses بعد + verbal noun (masdar) to mean after doing X or after X happens.

So بعد التعقيم is a compact way to say after the sterilization / after the neutering procedure.

In Egyptian Arabic, you can also hear a fuller structure with بعد ما + verb, but بعد التعقيم sounds very normal in instructions, advice, or medical-style language.

لازم is a very common Egyptian word meaning must, has to, or needs to.

So لازم يرتاح means must rest or needs to rest.

A useful point: لازم does not change for person or number:

• أنا لازم أروح = I have to go
• هو لازم يروح = he has to go
• هم لازم يروحوا = they have to go

In Egyptian Arabic, لازم is usually followed directly by a present-tense verb:

• لازم يرتاح
• لازم تاكل
• لازم نتحرك

So English needs to in needs to rest, but Arabic does not add an equivalent word here.

This is one of the very common patterns learners need to get used to.

Because الأليف is an adjective describing الحيوان, and in Arabic adjectives come after the noun and must match it in definiteness.

So:

• حيوان أليف = a pet / a domesticated animal
• الحيوان الأليف = the pet

This matching is very important in Arabic grammar. If the noun has الـ, the adjective usually has الـ too.

In careful standard spelling, it should be الأليف.

The version الاليف is very common in casual typing because many people leave out the hamza when writing quickly online or in texts.

So:

• الأليف = formal/careful spelling
• الاليف = casual spelling you may often see

As a learner, it is good to recognize both, but write الأليف when you want to be correct and formal.

Because the subject الحيوان الأليف is grammatically singular and masculine.

So the verb is:

• يرتاح = he/it rests

Arabic verbs agree with the grammatical gender and number of the subject. Since الحيوان is masculine singular, يرتاح is the expected form.

If you were referring to a feminine subject, you would use ترتاح.

A common Egyptian-style pronunciation is roughly it-taʿʔīm or et-taʿʔīm.

Two helpful pronunciation notes:

• The الـ in التعقيم is followed by ت, which is a sun letter, so the l sound of الـ disappears in pronunciation and you hear a doubled t sound.
• In many Egyptian accents, ق is pronounced as a glottal stop ʔ.

So the written form is التعقيم, but the spoken form sounds closer to it-taʿʔīm.

One common pronunciation is:

baʿd it-taʿʔīm, il-ḥayawān il-alīf lāzem yirtāḥ

You may hear small vowel differences depending on the speaker, but this is a useful guide for Egyptian pronunciation.

It is understandable and natural, especially in written advice or semi-formal speech.

That said, everyday Egyptian might also use slightly different wording, such as:

• بعد التعقيم لازم الحيوان الأليف يرتاح
• بعد العملية، الحيوان الأليف لازم يرتاح

So the sentence is good, but there is some flexibility in word order and wording.

Literally, الحيوان الأليف is definite, so it means the pet.

However, Arabic often uses the definite form in general statements or instructions where English might say something more generically, like a pet or pets.

So in a sentence like this, it can function a bit like general advice about what a pet should do after the procedure, not only one specific named pet.