black-capped

The compound adjective "black-capped" is a transparent descriptive formation from two native English elements. "Black" originates from the Proto-Germanic \blakaz, meaning "burned," which evolved in Old English to denote the darkest color. "Capped" derives from the noun "cap," from Late Latin cappa (a hooded cloak), which came to mean a covering for the head and, by extension, any top covering. Combined, the term literally means "having the top covered in black," a logical and descriptive construction commonly used in ornithology to name species like the black-capped chickadee, where the defining feature is a distinct black patch on the head.

Structure: black (color) + capped (covered) - black: From Old English blæc, meaning "dark, ink." It functions as an adjective describing the color. - capped: From the verb cap, meaning "to cover the top or end of," plus the past participle suffix -ed. It functions as an adjective indicating a state of being covered.