Koyu

Koyu is a Turkish adjective meaning dark, deep, or thick. It is commonly used to describe colors, liquids, smoke, and other perceptible qualities, as well as to convey intensity or seriousness in a non-literal sense.

In color and appearance, koyu is used to form phrases such as koyu renk (dark color) and koyu kahverengi (dark brown). It can also describe density or opacity, as in koyu duman (dense smoke) or koyu su (murky water). Metaphorically, it appears in expressions that emphasize depth, gravity, or severity, such as koyu ton (deep tone) or koyu bir fikir/düşünce (a serious or heavy idea).

Linguistically, koyu is of Turkish origin and is productive in creating compound adjectives that intensify the base noun. It is part of everyday speech and across Turkish literature, media, and design terminology, where it helps distinguish shades, moods, and emphases. The word is also encountered in transliterations or as a proper noun in various Turkic-speaking regions, where it may appear in place names or surnames, though such uses are context-dependent and not tied to a single fixed meaning.

Overall, koyu functions as a versatile descriptor for darkness, depth, and density, with broad applicability in describing both physical attributes and figurative states in Turkish.