Verb Extension Order

Level 3

Swahili verbs can take multiple extensions (suffixes) to change their meaning. When stacking them, they usually follow a strict order known as the CARP rule: Causative, Applicative, Reciprocal, Passive.

How It Works

When you combine verb extensions, Swahili generally follows a standard sequence, though the order can sometimes vary based on semantic Scope in Extension Stacks.

The Standard Sequence:

  • Reversive (-u-/-o-)
  • Stative (-ik-/-ek-)
  • Causative (long -ish-/-esh- or short -z-/-y-/-sh-)
  • Applicative (-i-/-e-)
  • Reciprocal (-an-)
  • Passive (-w-)

A helpful acronym for the core extensions is CARP (Causative-Applicative-Reciprocal-Passive). While the Reversive and Stative extensions precede them in the overall sequence, they are not part of the acronym itself.

For example, if you want to say "to be cooked for" (Applicative Before Passive), the applicative -i- comes before the passive -w-, forming -i-w-a (e.g., kupikiwa).

Crucial Rules:
1. Iterative Vowel Harmony: Vowel harmony is local. Each extension takes its cue from the vowel immediately preceding it. If the root has a mid-vowel ('e' or 'o'), the Applicative, Stative, and Causative extensions take 'e' (never 'o'). That vowel then triggers the harmony for the next extension (e.g., -esh- triggers -e-). The Reversive Extension behaves differently: it only harmonizes with 'o' and takes 'u' if the root has 'e' (e.g., tega -> tegua). The Reciprocal (-an-), Passive (-w-), and short causatives (-z-, -y-, -sh-) are immune to vowel harmony.
2. The Bridge 'L': When a verb ends in consecutive vowels (such as after a reversive extension or in verbs like nunua or sahau), an 'l' is inserted as a bridge consonant before adding further extensions. For example, fungua (open) becomes fungulia (open for). Historically, this 'l' was part of the Proto-Bantu suffix (e.g., the applicative was originally -il-) that now only surfaces between vowels. Note that Arabic loanwords ending in a single vowel (e.g., rudi, jibu) do not take the 'l' bridge; instead, they drop their final vowel and replace it with the extension (e.g., jibu + applicative -> jibia; samehe + applicative -> samehea).
3. Monosyllabic Verbs: Monosyllabic verbs form extensions irregularly to avoid impossible consonant clusters (like lw or pw). Furthermore, adding an extension adds a syllable, which removes the need for the dummy 'ku-' in finite tenses (e.g., ninaliwa, not ninakuliwa).
4. Complex Combinations: While some extensions seem contradictory, they can co-occur. For instance, the stative and passive can appear together, typically bridged by an applicative (e.g., haribikiwa).
5. The Passive is Terminal: The passive -w- is strictly the last extension before the final vowel -a.

While textbooks sometimes show theoretical "monster verbs" with four extensions, native speakers rarely use more than two at a time.

Passive Bridges and the Scope of the Mnemonic:
Longer passive forms include nunua → nunuliwa (buy → be bought) and sahau → sahauliwa (forget → be forgotten). Native a-final stems replace the final a when building a derived stem; non-a loan stems have their own patterns. CARP is a useful default order, not an inviolable law: meaning and established lexical forms can give other orders, including applicative before causative.

Examples (4)

  1. Mwalimu alimsomeshea mtoto nyumbani.

    The teacher taught (caused to read for) the child at home.

    Word by Word: Teacher read-caused-for child at-home.

    The causative -esh- precedes the applicative -e-. Notice the iterative vowel harmony: the root vowel 'o' in som- dictates the 'e' in -esh-, and that 'e' in turn dictates the 'e' in the applicative -e-.

  2. Chakula kilipikiwa wageni.

    The food was cooked for the guests.

    Word by Word: Food was-cooked-for guests.

    The applicative -i- comes before the passive -w-, following the standard extension order.

  3. Walijulishana habari.

    They informed each other of the news.

    Word by Word: They-know-caused-each-other news.

    The causative -ish- (to make know / inform) precedes the reciprocal -an- (each other).

  4. Wanafunzi waliandikiana barua.

    The students wrote letters to each other.

    Word by Word: Students wrote-for-each-other letters.

    The applicative -i- (to/for) precedes the reciprocal -an- (each other).

Common Mistakes

  • Forgetting vowel harmony on the second extension.

    Mwalimu alimsomeshia mtoto nyumbani.
    Mwalimu alimsomeshea mtoto nyumbani.

    When stacking extensions, vowel harmony is iterative, meaning each extension takes its cue from the vowel immediately preceding it. Because the causative extension -esh- has the mid-vowel 'e', the following applicative extension must also take the mid-vowel 'e' (forming -eshea), not -i-.

  • Placing the passive extension before other extensions based on English logic.

    Wageni walipikwia chakula.
    Wageni walipikiwa chakula.

    The passive extension -w- must always be the absolute last extension before the final vowel, regardless of the logical translation order in English.

How It Connects

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

Verb Extension OrderLevel 3

Learn This First

To understand the order in which verb extensions are applied (the CARP rule), you must first be familiar with the individual extensions themselves and how they fit into the overall Swahili verb template.

Learn Next

Patterns that build on this one.