Breakdown of Mantıksız ve tutkusuz biri bana uygun değil.
ben
I
değil
not
ve
and
biri
someone / one (of them)
Questions & Answers about Mantıksız ve tutkusuz biri bana uygun değil.
How does the -sIz suffix change the meaning of mantık and tutku, and why are the vowels different?
The -sIz suffix means 'without' (similar to the English suffix '-less'). It attaches to nouns to turn them into adjectives. Mantık means 'logic', so mantıksız is 'illogical'. Tutku means 'passion', making tutkusuz 'passionless'. The vowel changes follow four-way vowel harmony: the last vowel in mantık is 'ı', which takes -sız, while the last vowel in tutku is 'u', taking -suz.
Could we use the -cI suffix here, like mantıkçı, instead?
No, because the -cI suffix creates a noun describing someone's profession, habit, or ideology. Mantıkçı means a 'logician' (someone who studies logic). Since this sentence is about a person lacking these qualities rather than making a profession of them, the privative -sIz suffix is used.
Why is biri used here to mean 'person' instead of insan or kişi?