Learn Turkish: Kapkaranlık gecede dümdüz yolda yürüyordun. - You were walking on the perfectly flat road in the pitch-dark night.

To intensify an adjective, you take its first syllable (ka-), add one of four intensifying consonants (m, p, r, or s) — in this case p — and attach it to the front of the original word. This gives us kap + karanlık = kapkaranlık (pitch-dark).

Why does dümdüz use an m instead of a p like in kapkaranlık?

There is no strict rule for which consonant (m, p, r, or s) an adjective takes when it is intensified. You just have to learn them by heart as you encounter them. For düz (flat or straight), the standard prefix is düm-, creating dümdüz.

Why are there two locative suffixes in this sentence (gecede and yolda)?

Both phrases answer different questions for the verb. Kapkaranlık gecede tells us when the action happened (in the night), while dümdüz yolda tells us where it happened (on the road). Since they are separate phrases modifying the verb, they each need their own locative suffix (-de and -da).

What tense is yürüyordun and how is it built?