reed-thin

The compound adjective 'reed-thin' is a relatively modern formation, drawing on two ancient Germanic roots to create a vivid metaphorical description. The first element, 'reed', originates from Proto-Germanic kreut-, referring to the tall, slender plant, and evokes an image of fragile, narrow verticality. The second element, 'thin', descends from Proto-Germanic thunnuz, carrying the core meaning of scant thickness. The compound's logic is transparently comparative: it suggests thinness to the specific degree or of the specific delicate quality associated with a reed stalk, intensifying the basic adjective 'thin' with a natural, visual simile. This construction follows a classic English pattern of creating descriptive compounds where a noun modifies an adjective to specify manner or degree.

Structure: reed (plant) + thin (slender) - reed: From Old English hrēod, meaning a tall, slender grass-like plant. In this compound, it functions as a metaphorical root, providing the image of a thin, pliable stalk. - thin: From Old English þynne, meaning having little thickness or density. In this compound, it functions as the core adjective, with 'reed' acting as an intensifying modifier.