Description:

The term 'exti' pertains to being lost and losing, in a sense of not having a known location, and also by metaphirical extension to being defeated in battle or losing at a game.

Verb:

As a verb, 'exti' means to be lost. It is an intransitive pali takes an absolutive subject that is the thing lost. This requires some attention from English speakers. So if John has lost a match, you can say:

A pifit sete exti.

Essentially 'the match has been lost'. There is no place for John. In order to say John lost, or John lost the match, a causative skurun form is used with an ergative subject which is the one who has caused the thing to be lost, i.e., the loser (not the winner).

Ja Can tene exti a pifit.
The(ERG) John hit(NP.PF) lose the(ABS) match.

This is essentially 'John lost the match', but it is really more like 'the match is lost because of John'. Because of this structure, there is no antipassive of this expression, and to just say 'John lost', you would simply omit the object, as in 'Ja Can tene exti'.

The derived form 'roéxti' is a word for 'be condemned', and is often used as a causative skurun form with an ergative condemner added.

Noun:

As a noun, 'exti' means a loss or defeat. It can be used in expressing condolences as a way to euphemistically refer to someone's death.

The derived form 'roéxti' is a word for 'condemnation'

Modifier:

The modifier forms 'extis' and 'roéxtis' both have a sense like lost of condemned, with the former being fairly mild latter being strong.