Diminutive Adjectives 

If you want to tone down an adjective so that it's meaning is less intense, then you'll revert to appending a suffix to it.
(Oh, well. It was nice while it lasted, wasn't it?) 

For example, if you want to diminish the intensity of meaning expressed by the adjective pahalI (expensive), then you add the suffix -ca to make pahalIca (somewhat expensive).

Diminutive Adjectives with -ca (-ce) suffixes 

Ordinary adjective

Diminished

Example

English meaning

gьzel
(pretty)

gьzelce

gьzelce bir resim

a fairly pretty picture

temiz
(clean)

temizce

temizce bir gцmlek

a rather clean shirt

yesil
(green)

yesilce

yesilce bir gцlcьk

a greenish pond

Sample sentences...
Meryl Streep gьzelce bir kadIndIr.
Meryl Streep is a fairly good looking woman. 

Dьn gece gittigimiz striptiz pahalIca, degil mi?
The striptease show we went to last night was somewhat expensive,
wasn't it? 

Benjamin temizce sakalar sцyler -- annesinin цnьnde!
Benjamin tells rather clean jokes -- in front of his mother! 

Ekmekte yesilce noktalar hos degildir.
The greenish mold on the bread is unappetizing.

Diminutive Adjectives
with -cik (-cIk, cьk, cuk) suffixes 

Ordinary adjective

Diminished

Example

English meaning

ufak
(small)

ufacIk

ufacIk bungalov

a rather small bungalow

bir
(one)

biricik

biricik firsat

a one-of-a-kind opportunity

kьзьk
(little)

kьзьcьk

kьзьcьk bцcek

a tiny insect

yavru
(young animal, child)

yavrucuk

yavrucuk
(You're not seeing things. By adding the suffix -cuk, we've constructed a diminutive noun -- which stands alone.) 

a sweet little thing, a sweet little darling

Sample sentences...
UfacIk bir kanyagI
siddetli bir bas agrIsIna tercih ederim.
I'd rather have a very small cognac than a very strong headache. 

Sen benim biricik yaslI enayimsin.
You are my one and only old fool.
(An old fool is unique.) 

O kьзьcьk зocuk at gibi yer!
That wee child eats like a horse! 

HypatianIn buruncugu en iyi цzelligi.
Hypatia's cute little nose is her best feature. 

Diminutive Adjectives with
-msI (-ImsI, -imsi, -umsu) suffixes 

Note: Diminutive adjective suffixes shown in this panel and the
next panel are used sparingly in Turkish.
Furthermore, they are mostly used for adjectives of
color and taste...

Ordinary adjective

Diminished

Example

English meaning

sarI
(yellow, blond)

sarImsI

sarImsI yazma

a yellowed manuscript

agIr
(heavy)

agIrImsI

agIrImsI karar

a rather heavy decision

yesil
(green)

yesilimsi

yesilimsi gecelik

a greenish nightgown

mor
(purple)

morumsu

morumsu зiзekler

purplish flowers

Sample sentences... 

SarImsI saзlI bomba sova ilk cIkIsta ьstьn basarI sagladI.
The blondish bombshell made a big hit at the show's opening.

O agIrImsI bir yьk degil, o benim kardesim.
That's not a heavyish load, that's my brother. 

Smith'ler Jones'larI kIskanmaktan yesilimsi oldu.
The Smiths are a little green with envy of the Joneses. 

Holyfieldin dцvьsden dolayI hala bir morumsu gцzь var.
He still has a purplish eye because of the beating he took from Holyfield. 

G.L. Lewis points out an interesting variation that belongs to this categorey of diminutive adjective suffixes. He indicates that for some nouns and adjectives (ending in consonants), you may attach the shortened suffix '-si' (-sI, -sь, -su)
to form the diminutive adjective.
So, for example, you can attach the shortened suffix for,
erkek male, erkeksi mannish; зocuk child, зocuksu childish.

That last bit of info isn't much help, Marvin...How'm I supposed to
know which words do take the 'shortened' suffix -- and which don't?
I dunno, Mabel.
Well... Maybe it doesn't matter that much..? Whaddya think?
Problee mebbe. Mebbe problee. 
You've had better days, Marvin...
mebbe...
problee.

Diminutive Adjectives with
-mtIrak (-ImtIrak, -imtIrak, -umtIrak) suffixes 

Note: Diminutive adjective suffixes shown in this panel and the
former panel are used sparingly in Turkish.
Furthermore, they are mostly used for adjectives of
color and taste...

Ordinary adjective

Diminished

Example

English meaning

eksi
(sour, tart, acidic)

eksimtIrak

eksimtIrak зilek

a sourish strawberry

beyaz
(white)

beyazImtIrak

beyazImtIrak plastik

a whitish plastic

acayip
(strange, peculiar)

acayibimtIrak

acayibimtIrak цneri

a rather strange suggestion

burusuk
(wrinkled, rumpled)

burusumtIrak

burusumtIrak giysiler

somewhat wrinkled clothing

Sample sentences... 

O sьtь iзmeyin! EksimtIrak.
Don't drink that milk! It's a bit sour.

YaslI adamIn beyazImtIrak saзI gьzide gцrьnьyor.
The old man's whitish hair looks distinguished. 

Barnaby'nin olaylarIn gьlьnз yцnьnь gцrme yetenegi acayibimtIrak[tIr].
Barnaby has a rather peculiar sense of humor. 

Kevin sudan зIktIgInda, cildi burusumtIraktI.
When Kevin got out of the water, his skin was a bit wrinkled. 

Note:
Adjectives related to colors or tastes can take the diminutive endings either from this panel or the former panel. So, either yesilimsi kumas or yesilimtIrak kumas is correct. And they both mean greenish material.