Learn Turkish: Neden böyle dalgın ve küskün görünüyorsun? - Why do you look so absent-minded and resentful?

The verb dalmak literally means "to dive" or "to plunge." By adding the suffix -gın, we create an adjective describing the state resulting from that action. Someone who has "dived" deep into their own thoughts is dalgın, meaning "absent-minded," "distracted," or "pensive."

Why does küskün take the -kün suffix instead of -gın?

This happens because of two phonetic rules: consonant mutation and vowel harmony. The root verb is küsmek (to be offended / to sulk). Since the root ends in a voiceless consonant (s), the suffix must start with the voiceless k instead of g. Then, vowel harmony dictates that the rounded front vowel ü takes another ü, resulting in -kün.

What is the difference between görüyorsun and görünüyorsun here?

Görüyorsun comes from görmek (to see) and simply means "you see." The sentence instead uses görünmek (to appear / to look), which is formed by adding the passive/reflexive suffix -ün to the root. It literally means "to be seen," which is the standard way Turkish expresses "you look [a certain way]."

Doesn't böyle usually mean "like this"? Why is it translated as "so"?