Who does and what is done: -tzaile and -keta

Basque makes profession words out of verbs the way a joiner makes shelves out of boards. The verb stem + -tzaile/-zaile is the doer: saldu — to sell, saltzaile — a seller; eraiki — to build, eraikitzaile — a builder. Short stems shrink: eroste gives erosle — a buyer, idatzi gives idazle — a writer. For example: “Saltzailea dendan dago” — The seller is at the shop. A rule from the Basque course: worked out on…

Updated September 1, 2026 · Lingofly

How it works

Basque makes profession words out of verbs the way a joiner makes shelves out of boards. The verb stem + -tzaile/-zaile is the doer: saldu — to sell, saltzaile — a seller; eraiki — to build, eraikitzaile — a builder. Short stems shrink: eroste gives erosle — a buyer, idatzi gives idazle — a writer.

And the action itself, turned into a thing, is made by the suffix -keta: berotu — to warm, beroketa — a warm-up; lan egin — to work, lanketa — work, processing. The pair -tzaile + -keta covers half the vocabulary of professions: who does — on -tzaile, what they do — on -keta.

Table

Who does and what is done: -tzaile and -keta
the meaningthe formthe example
the doerstem + -tzaile/-zaile/-leeraiki → eraikitzaile
a short stemstem + -leidatzi → idazle
an action as a thingstem + -ketaberotu → beroketa

By example

  • Saltzailea dendan dago
    The seller is at the shop
  • Eroslea ogia hartzen du
    The buyer takes the bread
  • Entrenamenduaren aurretik beroketa egin behar da
    Before the workout a warm-up must be done

How the rule settles in your head

A rule is not memorized from an explanation. It is memorized from an attempt to use it and a mistake — that is why the app delivers it mixed in with words, not as a separate lesson: it resurfaces exactly where you forgot it.

Frequently asked

Who does and what is done: how does it work in Basque?

Basque makes profession words out of verbs the way a joiner makes shelves out of boards. The verb stem + -tzaile/-zaile is the doer: saldu — to sell, saltzaile — a seller; eraiki — to build, eraikitzaile — a builder. Short stems shrink: eroste gives erosle — a buyer, idatzi gives idazle — a writer.

What does it look like in an example sentence Basque?

“Saltzailea dendan dago” — The seller is at the shop. A rule is easier to test on sentences like this than to memorize as a wording: what surfaces in conversation is the sentence.

Next

Test the rule on examplesPractice