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In English, we describe durable materials with suffixes like "-proof", "-free", or "un-...-able"—such as a *non-stick* pan, *unbreakable* glass, or a *bulletproof* vest. Turkish expresses these impossible traits using the negative aorist participle.

### The Negative Aorist Participle (-mAz)

To turn a verb into an adjective that describes what an object *never* does, attach the suffix `-maz` or `-mez` to the verb stem (following 2-way vowel harmony).

For example, from the verb *yapışmak* (to stick), we get the adjective *yapışmaz* (non-stick). From *paslanmak* (to rust), we get *paslanmaz* (stainless/rust-proof). These participles sit directly before the noun they describe.

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### Indestructible Features ("un-...-able")

When paired with passive verb stems, `-maz` and `-mez` describe something that actively resists manipulation. 

If we take a passive verb like *kırılmak* (to be broken) or *bükülmek* (to be bent) and add the negative aorist suffix, we create adjectives like *kırılmaz* (unbreakable) and *bükülmez* (unbendable) perfectly suited for discussing stress tests and product durability.

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### Compound Adjectives ("X-proof")

You will frequently see this participle combined with a noun to specify exactly what a material resists. 

For instance, the verb *geçirmek* means "to let through" or "to permit passage". If you place *kurşun* (bullet) in front of it and add `-mez`, you create the compound adjective *kurşun geçirmez* (bulletproof). Similarly, *ısı geçirmez* means "heat-proof".

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Negative aorist adjectives (-mAz)

adjective

adverb

conjunction

determiner

interjection

noun

numeral

particle

postposition

preposition

pronoun

sentence

verb

Demonstrative pronouns (bu, şu, o)

Basic question words (kim, ne)

Plural nouns (-lar, -ler)

I am and you are (-(y)ım, -sın)

We, you, and they are (-(y)ız, -sınız)

Negative statements (değil)

Yes and no questions (mı, mi, mu, mü)

Questions with 'to be' (mısın, mıyım)

Numbers 1 to 10 (bir, iki, üç)

Numbers 11 to 20 (on bir, on iki)

Numbers by tens to 100 (otuz, kırk...)

Counting objects (tane)

The locative case (-da, -de)

Consonant assimilation (-ta, -te)

Asking where (nerede)

There is / there are (var)

There is not / there are not (yok)

Asking how many (kaç)

Infinitive verbs (-mak, -mek)

Informal commands (git, gel)

Negative commands (-ma, -me)

Polite and plural commands (-In, -InIz)

Basic word order

Present continuous for consonant roots (-iyor)

Present continuous for vowel roots (-iyor)

Present continuous personal suffixes (-iyorum)

Negative present continuous (-miyor)

Present continuous questions (-iyor mu)

Future plans with present continuous

The dative case (-(y)a, -(y)e)

Consonant mutation (k, t, p, ç to ğ, d, b, c)

From or out of (-dan / -den)

Directional question words (nereye, nereden)

First and second person possessives (-(i)m, -(i)n)

Third person possessive (-(s)i)

Plural possessives (-imiz, -iniz, -leri)

The genitive case (-(n)in)

Definite noun compounds (-nin ... -si)

Indefinite noun compounds (bare noun + -(s)i)

Possessive buffer letter (n)

Spatial postpositions (içinde, üstünde)

The definite direct object (-(y)ı, -(y)i)

Object question words (kimi, neyi)

Adjectives modifying nouns

Manner and choice questions (nasıl, hangi)

Basic degree modifiers (çok, biraz)

Comparisons (daha, en)

Days of the week

Months of the year

The time question word (ne zaman)

Telling time (saat, buçuk)

Asking the time (saat kaç, saat kaçta)

Basic conjunctions (ve, ama, veya)

Causality conjunction (çünkü)

Means and accompaniment (ile, -(y)lA)

Purpose and beneficiaries (için)

Expressing desire (-mak istemek)

The past copula (-(y)DI)

The direct past tense (-DI)

Past tense personal suffixes (-DIm, -DIn)

Past tense negative (-mAdI)

Past tense questions (-DI mI)

Ordinal numbers (-(I)ncI)

Greetings and politeness

Saying 'too' (de, da)

Conversation fillers (şey, yani, hadi)

Conversational essentials

Reflexive pronouns (kendim, kendin)

Reciprocal pronouns (birbiri)

Indefinite pronouns for people (herkes, kimse)

Indefinite pronouns for things and places (her şey, hiçbir şey)

Conjunctions of consequence (bu yüzden, bu nedenle)

Correlative conjunctions (hem... hem, ne... ne)

Verbs taking the dative case (-e / -a)

Verbs taking the ablative case (-den / -dan)

Time origin (beri)

Time duration (-DIr)

Comparisons of similarity (gibi)

Comparisons of equality (kadar)

Perspectives (göre)

Verbal nouns (-mA / -mE)

Verbal nouns as objects (-mAyI / -mEyI)

Verbal nouns with the dative (-mAyA / -mEyA)

General necessity (lazım / gerek)

Personal necessity (-mAm lazım)

Third-person commands (-sIn / -sInlAr)

First person singular optative (-(y)AyIm)

Question	Answer
to tear (intransitive) / to be torn	yırtılmak
steel	çelik
We used not only tear-proof fabric but also stainless steel.	Sadece yırtılmaz kumaş değil, aynı zamanda paslanmaz çelik de kullandık.
to bend / to be bent	bükülmek
It is difficult to assemble unbendable steel parts in the factory.	Bükülmez çelik parçaları fabrikada birleştirmek zordur.
impact / blow	darbe
Unbreakable glasses withstand heavy impacts.	Kırılmaz camlar ağır darbelere dayanır.
Do tear-proof tents withstand hard impacts?	Yırtılmaz çadırlar sert darbelere dayanır mı?
bullet / lead	kurşun
to test	test etmek
We tested the bulletproof vests in the forest.	Kurşun geçirmez yelekleri ormanda test ettik.
Bulletproof glasses must never break.	Kurşun geçirmez camlar asla kırılmamalı.
to leak	sızdırmak
I had to buy a waterproof tent for the holiday.	Tatil için su sızdırmaz çadır almam lazımdı.
The engineers tested the leak-proof pipes under pressure.	Mühendisler sızdırmaz boruları basınç altında test ettiler.
to stick (intransitive)	yapışmak
I prefer cooking meat in a non-stick pot.	Yapışmaz tencerede et pişirmeyi tercih ediyorum.
This is not a non-stick pot, everything burns.	Bu yapışmaz bir tencere değil, her şey yanıyor.
to wrinkle	kırışmak
Are wrinkle-free shirts suitable for long journeys?	Kırışmaz gömlekler uzun yolculuklar için uygun mu?
I wore my new wrinkle-free trousers until they tore.	Yeni kırışmaz pantolonumu yırtılana kadar giydim.
The unbendable arms of the robot carry heavy boxes.	Robotun bükülmez kolları ağır kutuları taşır.
manufacturer	üretici
coating	kaplama
The manufacturer uses a scratch-proof coating.	Üretici, çizilmez bir kaplama kullanıyor.
Did you choose a stain-proof fabric?	Leke tutmaz bir kumaş mı seçtiniz?
The manufacturer's fireproof coating protects the material.	Üreticinin yanmaz kaplaması malzemeyi korur.
They tested the unbreakable glass without heating it.	Kırılmaz camı ısıtmadan test ettiler.
heat	ısı
Stainless steel did not melt in high heat.	Paslanmaz çelik yüksek ısıda erimedi.
This heat-proof coating is very durable.	Bu ısı geçirmez kaplama çok dayanıklı.

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