-mo-

Where Inside with -mo-

Level 3

Use the -mo- relative marker to describe actions or states that happen strictly inside an enclosed boundary, like a room, bag, or container.

How It Works

The locative relative -mo- is used to describe an action or state happening inside an enclosed space. It is formed by combining the Class 18 subject concord (mu-) with the 'o of reference' (mu- + o = -mo-). It is part of the PA-KU-MU locative system: while -po- refers to a definite place and -ko- to a general area, -mo- specifically means "in which," "where (inside)," or "within."

How to Attach -mo-

  • As a verb infix: It goes in the relative slot, right after the tense marker (or the negative marker -si-) and before any object marker. The slot order is: Subject + Tense (or negative -si-) + Relative + Object + Verb Root. Example: ni-li-mo-ki-weka (where I put it inside).
  • With amba-: It attaches to the relative base to form ambamo (inside which). See amba- relatives.
  • As a suffix: On the tenseless relative (e.g., alalamo - where he sleeps inside). The negative equivalent uses the -si- infix instead of a suffix (e.g., asimolala - where he does not sleep inside).
  • With copulas: Attached to the emphatic ndi- to form ndimo (it is inside there that), or attached to a subject marker to form locative copulas expressing who or what is inside (e.g., yumo - he/she is inside).

Locative Inversion (Inside as the Subject)
In Swahili, the inside space itself can be the subject of the sentence. When this happens, the verb takes the Class 18 subject prefix m-, and the relative marker is -mo-. For example: Chumbani mlimolala wageni... (Inside the room where the guests slept...). See locative existential order.

Tense Restrictions
The relative infix -mo- can be used with three specific affirmative tenses: -li-, -na-, and -taka-, as well as the negative marker -si- used in relative clauses. Note that the standard future marker -ta- changes to -taka- when a relative is added (e.g., nitakamoweka, not nitamoweka). For other tenses, such as the perfect (-me-), consecutive (-ka-), or conditionals (-nge-/-ngali-), you must use the ambamo construction. However, note that ambamo is universal and can be used with any tense (e.g., ambamo niliweka), and is often preferred in modern spoken Swahili.

The Enclosure Rule
Swahili uses -mo- for interiors, but this includes abstract spaces (like moyoni - in the heart) and geopolitical borders conceptualized as enclosures (like nchini humo - in that country). Note that -mo- agreement is usually triggered by a noun made locative with the locative suffix -ni (e.g., chumbani, sandukuni).

Negation
To negate a verb with the -mo- infix, use the negative marker -si- used in relative clauses (e.g., ni-si-mo-weka). Note that this -si- relative construction completely replaces the tense marker and retains the final -a of the verb. It is tenseless and can mean 'where I do not put' or 'where I did not put' depending on context. Alternatively, you can use ambamo followed by a standard negative verb.

Examples (6)

  1. Chumba alimolala ni kikubwa.

    The room in which he slept is big.

    Word by Word: Room he-past-inside.which-sleep is big.

    The -mo- is infixed directly into the verb to refer back to the interior of the room (chumba).

  2. Hili ni sanduku ambamo ninaweka nguo.

    This is the suitcase in which I put clothes.

    Word by Word: This is suitcase inside.which I-present-put clothes.

    Here, -mo- attaches to the relative base amba- to form ambamo, clearly separating the relative pronoun from the main verb.

  3. Ndimo nilimoweka vitabu vyako.

    It is in there that I put your books.

    Word by Word: It.is.inside.there I-past-inside.which-put books your.

    This sentence uses -mo- twice: once on the emphatic copula (ndimo) and once as an infix in the verb (nilimoweka).

  4. Nyumba tunamoishi ina vyumba vitatu.

    The house in which we live has three rooms.

    Word by Word: House we-present-inside.which-live it-has rooms three.

    A house is an enclosed structure, so -mo- is the perfect relative marker to describe living inside it.

  5. Chumbani mlimolala wageni mna vitanda viwili.

    Inside the room where the guests slept, there are two beds.

    Word by Word: Room-in in-past-inside.which-sleep guests in-has beds two.

    This demonstrates locative inversion. The inside of the room is the subject of the sentence, so the verb takes the Class 18 subject prefix m- along with the relative infix -mo- (mlimolala).

  6. Hili ni sanduku nisimoweka nguo.

    This is the suitcase in which I do not put clothes.

    Word by Word: This is suitcase I-negative-inside.which-put clothes.

    To negate the relative verb, the negative marker -si- is used before the relative infix -mo-. This structure is tenseless and can refer to past or present depending on context.

Common Mistakes

  • Assuming -mo- can only be used for physical boxes or rooms.

    Moyoni mwangu ndiko ninakohisi furaha.
    Moyoni mwangu ndimo ninamohisi furaha.

    While -mo- refers to interiors, this includes abstract spaces like the heart (moyoni) or mind (akilini), as well as geopolitical borders conceptualized as enclosures (e.g., nchini humo). It is not limited to physical containers.

  • Confusing the -mo- relative marker with the Class 1 human object marker -m-.

    Nilimoweka kitandani.
    Nilimweka kitandani.

    Because -mo- contains an 'm', learners sometimes think it means 'him' or 'her'. 'Nilimoweka' means 'where I put (it) inside', whereas 'Nilimweka' means 'I put him/her'. If you need both, the object marker follows the relative: nilimomweka (where I put him inside).

How It Connects

Tap a pattern to see what it builds on and what it leads to.

-mo-Level 3Where Inside with -mo-

Learn This First

To understand the '-mo-' interior relative, a learner must first be familiar with the Swahili relative infix system and how locative classes (specifically Class 18, the 'mu-' class) function to denote interior space. This pattern combines the relative 'o' of reference with the interior locative marker 'mu-'.

Words in This Pattern

-mo