English packages reciprocal meaning into each other and one another. Formal contemporary Modern Standard Arabic commonly uses two occurrences of بعض “some/part”: بعضهم بعضًا, literally “some of them [affect] others.” The attached suffix identifies the participant set, while the second بعض receives the role required by the verb or preposition.
Reciprocity requires at least two participants and describes relations in more than one direction. “A helped B” is not reciprocal; “A and B helped each other” is. Arabic can express that relation explicitly with بعضهم بعضًا, through a prepositional pattern such as بعضهم مع بعض, or lexically through certain plural verbs. Those choices overlap, but they are not mechanically interchangeable.
For the contrasting construction in which an action returns to the same individual, see Reflexive Meaning with نفس.
The participant forms
There is no ordinary first-person singular reciprocal: one person cannot act mutually with themselves. The useful forms begin with “we,” dual, and plural groups. The suffix is attached directly to the first بعض.
| Participant set | Direct-object frame | Reading |
|---|---|---|
| we / us | بعضنا بعضًا | baʿḍunā baʿḍan |
| you two | بعضكما بعضًا | baʿḍukumā baʿḍan |
| you, masculine or mixed plural | بعضكم بعضًا | baʿḍukum baʿḍan |
| you, feminine plural | بعضكن بعضًا | baʿḍukunna baʿḍan |
| they two | بعضهما بعضًا | baʿḍuhumā baʿḍan |
| they, masculine or mixed human plural | بعضهم بعضًا | baʿḍuhum baʿḍan |
| they, feminine human plural | بعضهن بعضًا | baʿḍuhunna baʿḍan |
The case of the first بعض depends on its syntactic place. In a fully inflected direct-object pattern, it is often nominative as a distributive expression associated with the subject, while the second is accusative because it represents the affected participants.
يساعد أعضاء الفريق بعضهم بعضا عند ضغط العمل.
yusāʿidu ʾaʿḍāʾu l-farīqi baʿḍuhum baʿḍan ʿinda ḍaghṭi l-ʿamal.
The team members help one another when work is intense.
احترم الوفدان بعضهما بعضا طوال المفاوضات.
iḥtarama l-wafdāni baʿḍuhumā baʿḍan ṭawāla l-mufāwaḍāt.
The two delegations respected each other throughout the negotiations.
Direct reciprocity versus a reflexive
A reflexive sends an action back to the same individual: “each student prepared herself.” A reciprocal distributes it among distinct members: “the students prepared one another.” Arabic makes the distinction overt.
هيأت الطالبات أنفسهن للمقابلة.
hayyaʾati ṭ-ṭālibātu ʾanfusahunna li-l-muqābala(h).
The students prepared themselves for the interview. (Each prepared herself.)
ساعدت الطالبات بعضهن بعضا في الاستعداد للمقابلة.
sāʿadati ṭ-ṭālibātu baʿḍuhunna baʿḍan fī l-istiʿdādi li-l-muqābala(h).
The students helped one another prepare for the interview. (All female.)
The first example does not claim interaction among students. The second necessarily does. This distinction is easy to blur in English when themselves is used loosely, but formal Arabic separates أنفسهن from بعضهن بعضًا.
Prepositional reciprocal frames
Many Arabic verbs select a preposition rather than a direct object. In that case the second بعض follows the required preposition. Common patterns include مع بعض “with one another,” إلى بعض “at/to one another,” عن بعض “from/about one another,” and على بعض “on/against one another.”
تحدث المندوبون بعضهم مع بعض قبل الجلسة.
taḥaddatha l-mandūbūna baʿḍuhum maʿa baʿḍin qabla l-jalsa(h).
The delegates spoke with one another before the session.
نظر الشاهدان بعضهما إلى بعض ثم التزما الصمت.
naẓara sh-shāhidāni baʿḍuhumā ʾilā baʿḍin thumma ltazamā ṣ-ṣamt.
The two witnesses looked at each other and then remained silent.
تختلف هذه النماذج بعضها عن بعض في التفاصيل.
takhtalifu hādhihi n-namādhiju baʿḍuhā ʿan baʿḍin fī t-tafāṣīl.
These models differ from one another in the details.
Notice that بعضٍ is genitive after مع, إلى, or عن, not accusative بعضًا. In unvocalized text both may look similar once the support alif of tanwīn fatḥ is considered, so understanding the verb's complement pattern matters.
In less formal everyday Arabic, regional varieties often use shorter expressions corresponding to “with each other.” This page teaches the explicit MSA patterns appropriate in formal speech and writing; dialectal forms should not be mixed into them without a regional label.
Both addressee genders
The suffix must match the people addressed. ـكم addresses a masculine or mixed group, while ـكن addresses an all-female group in formal MSA. The verb also marks this distinction.
ساعدوا بعضكم بعضا، ولا يعمل كل واحد منكم وحده.
sāʿidū baʿḍukum baʿḍan, wa-lā yaʿmal kullu wāḥidin minkum waḥdah.
Help one another, and do not each work alone. (Addressing men or a mixed group.)
ساعدن بعضكن بعضا، ولا تعمل كل واحدة منكن وحدها.
sāʿidna baʿḍukunna baʿḍan, wa-lā taʿmal kullu wāḥidatin minkunna waḥdahā.
Help one another, and do not each work alone. (Addressing an all-female group.)
English you hides this contrast. Formal Arabic preserves it in the imperative, the reciprocal suffix, and expressions such as منكم or منكن.
Reciprocal verbs: useful, but not automatic
Some plural verbs lexically imply mutual participation. Form VI often has a reciprocal tendency: تعاونوا “they cooperated,” تشاوروا “they consulted one another,” and تفاوضوا “they negotiated.” Form VIII التقوا means “they met.” An explicit بعضهم مع بعض may reinforce or clarify the relation.
تشاور أعضاء اللجنة ثم اتفقوا على صيغة مشتركة.
tashāwara ʾaʿḍāʾu l-lajnati thumma ttafaqū ʿalā ṣīghatin mushtaraka(h).
The committee members consulted one another and then agreed on common wording.
تبادل الباحثون البيانات بعضهم مع بعض.
tabādala l-bāḥithūna l-bayānāti baʿḍuhum maʿa baʿḍ.
The researchers exchanged data with one another. (academic)
Derived-form meaning is a tendency, not a formula. A Form VI verb does not automatically mean “do X to each other”: تجاهل means “ignore,” and تناول can mean “address/discuss” or “consume.” Learn the attested meaning of each verb. When a context could support a one-way or collective reading, the explicit reciprocal phrase removes doubt.
Independent pronouns, null subjects, and host-conditioned suffixes
Compare an independent subject with the attached reciprocal suffix:
هم يتعاونون لأن بعضهم يثق ببعض.
hum yataʿāwanūna li-ʾanna baʿḍahum yathiqu bi-baʿḍ.
They cooperate because they trust one another.
Independent هم stands as a contrastive subject. Attached ـهم belongs to the noun بعض and marks the participant set. It is not a shortened form inserted after a space. The verb يتعاونون itself marks a masculine or mixed plural subject, so هم may be omitted when topic continuity makes the group clear: يتعاونون لأن....
Relative antecedents and discourse clarity
A relative clause may need its own resumptive suffix before the reciprocal construction appears:
الموظفون الذين تحدثت معهم يساعد بعضهم بعضا عند الحاجة.
al-muwaẓẓafūna lladhīna taḥaddathtu maʿahum yusāʿidu baʿḍuhum baʿḍan ʿinda l-ḥāja(h).
The employees whom I spoke with help one another when needed.
The ـهم in معهم resumes masculine plural الموظفون as the complement of “with.” The ـهم in بعضهم then identifies that same group as the reciprocal set. If two plural groups are equally available, name the intended set again.
Common Mistakes
Losing second-person gender
❌ ساعدن بعضكم بعضا يا زميلات.
Incorrect — an all-female addressee group requires -kunna, not masculine/mixed -kum.
✅ ساعدن بعضكن بعضا يا زميلات.
sāʿidna baʿḍukunna baʿḍan yā zamīlāt.
Help one another, colleagues. (Addressing an all-female group.)
Detaching the suffix
❌ يساعدون بعض هم بعضا.
Incorrect — the participant suffix is written directly on baʿḍ.
✅ يساعدون بعضهم بعضا.
yusāʿidūna baʿḍuhum baʿḍā.
They help one another.
Copying English possessor order
❌ هم بعض يساعد بعض.
Incorrect — independent hum cannot stand before baʿḍ as an English-style possessive word.
✅ يساعد بعضهم بعضا.
yusāʿidu baʿḍuhum baʿḍā.
They help one another.
Dropping a required preposition or resumptive
❌ الموظفون الذين تحدثت مع يتعاونون.
Incorrect — maʿ requires a suffix resuming al-muwaẓẓafūn.
✅ الموظفون الذين تحدثت معهم يتعاونون.
al-muwaẓẓafūna lladhīna taḥaddathtu maʿahum yataʿāwanūn.
The employees whom I spoke with cooperate with one another.
Leaving the participant set ambiguous
❌ اجتمع المعلمون مع الطلاب ثم ساعد بعضهم بعضا.
Ambiguous — baʿḍuhum may mean the teachers, the students, or members of both groups.
✅ اجتمع المعلمون مع الطلاب ثم تعاون أفراد المجموعتين بعضهم مع بعض.
ijtamaʿa l-muʿallimūna maʿa ṭ-ṭullābi thumma taʿāwana ʾafrādu l-majmūʿatayni baʿḍuhum maʿa baʿḍ.
The teachers met with the students, and then members of the two groups cooperated with one another.
Key Takeaways
- Use بعض + suffix + بعضًا for a reciprocal direct-object relation and a preposition before the second بعض when the verb requires one.
- Match the suffix to the whole participant set, including masculine/mixed ـكم versus feminine ـكن.
- Reflexive أنفسهم sends action back to individuals; reciprocal بعضهم بعضًا distributes it among different members.
- Reciprocal meanings of derived verb forms are lexical tendencies, never automatic outputs of a pattern.
- Repeat the participant noun when more than one plural group could be the antecedent.
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