Pillars & acts of worship · Updated August 19, 2026

What Is Ruku? The bowing posture within a unit of salah

A plain-language definition of Ruku, its Arabic origin, and how Muslims use the term.

Simple definitionRuku means the bowing posture within a unit of salah.

What Ruku means

Ruku is the bowing posture within a unit of salah. The term belongs to the basic vocabulary Muslims use to describe pillars & acts of worship. It names a specific idea or practice rather than every part of the wider subject. That distinction matters because English translations can make several related Arabic terms look interchangeable when they are not.

Arabic origin and wording

Ruku comes from the Arabic root r-k-ayn, meaning to bow or bend. Transliteration into English varies, so the same word may appear with different apostrophes, vowels, or spellings. Those spelling differences usually point back to the same Arabic term; context is more useful than English spelling alone when identifying its meaning.

Ruku in daily Muslim life

In daily Muslim life, During prayer, a worshipper bends with hands placed near the knees, praises Allah, and then returns to standing. People may learn the word at home, in a mosque, in a class, or while reading translated Islamic material. Local customs and scholarly vocabulary can affect how often it is heard, but the core definition remains the one given here.

Related Islamic terms

Two useful related terms are Rakah and Sujud. Ruku should be understood alongside them without being collapsed into either one. Together, the three entries provide a clearer map of the surrounding vocabulary and make it easier to recognize the term when it appears in prayer, study, or conversation.

Frequently asked questions

What does Ruku mean?

Ruku means the bowing posture within a unit of salah. In Islamic usage, the surrounding context helps distinguish it from related terms.

How is Ruku used in Muslim worship?

During prayer, a worshipper bends with hands placed near the knees, praises Allah, and then returns to standing. The term is also encountered in Islamic teaching and conversation.