Prefixes and suffixes: Kiswahili word formation

Swahili uses prefixes and other word-building patterns extensively. Understanding them can help you recognise unfamiliar words and understand how different forms relate to one another.

What is a prefix?

A prefix is a group of letters placed at the beginning of a word.

Swahili uses prefixes for several grammatical purposes, including noun classes, subject marking and tense.

Subject prefixes

  • ni- — I
  • u- — you
  • a- — he/she
  • tu- — we
  • m- — you plural
  • wa- — they

For example:

ni + na + soma = nasoma
I am studying.

wa + na + soma = wanasoma
They are studying.

Tense markers

Common tense markers include:

  • -na- — present
  • -li- — past
  • -ta- — future

Examples:

  • ninasoma — I am studying
  • nilisoma — I studied
  • nitasoma — I will study

Infinitive prefix

The prefix ku- is commonly used with infinitive verbs.

Examples:

  • kula — to eat
  • kunywa — to drink
  • kusoma — to read/study
  • kuandika — to write
  • kwenda — to go

Noun-class prefixes

Noun prefixes are particularly important in Swahili.

Examples include:

  • m-/wa-
  • ki-/vi-
  • ji-/ma-
  • u-
  • ku-
  • pa-/ku-/mu- in locative constructions

Examples:

  • mtoto → watoto
  • kitabu → vitabu
  • jicho → macho

Deriving related words

Swahili can form related words using different word-building patterns.

For example, the verb:

soma — read/study

is related to:

msomaji — reader

mwanafunzi — student