Peegeldav

Peegeldav is an Estonian adjective and present participle derived from the verb peegeldama, meaning "to reflect". It literally describes something that reflects light, sound, images or other forms of radiation, and is commonly applied to surfaces, materials and phenomena that return or scatter energy back toward a source or into the environment.

Etymology traces to peegel ("mirror") with the verb-forming suffix -dama and the participial/adjectival suffix -v, producing peegeldav as "reflecting" or "reflective". In grammar it behaves like other Estonian adjectives and may be inflected to agree with case and number in noun phrases (for example, peegeldav pind, peegeldavat pinda).

In scientific contexts peegeldav is used to describe optical properties such as high reflectance or specular reflection, and it appears in discussions of materials (metals, coated glass, mirrors), atmospheric effects and acoustics. Distinctions between peegeldav pind (specular) and hajusalt peegeldav pind (diffusely reflecting surface) are common in technical writing.

In everyday language peegeldav is applied to clothing and safety gear with retroreflective elements, to artistic surfaces that mirror surroundings, and metaphorically to discourse or behavior that "reflects" ideas or attitudes. It is a neutral descriptive term without inherently positive or negative connotations.