rivulet

The word 'rivulet' is a diminutive formation, directly combining the essence of a stream with a marker of small size. Its core, 'rivu-', descends from the Latin noun rivus, meaning a small stream or channel, which itself traces back to the Proto-Indo-European root h₃reiH-, conveying the concept of flowing or running. The suffix '-let', of Old English origin, is a productive diminutive, akin to its use in words like 'booklet' or 'droplet'. Thus, a rivulet is, quite literally, a "little stream," a term that elegantly captures its modest scale while maintaining a direct semantic link to its larger aquatic counterparts.

Structure: rivu (stream) + let (small) - 'rivu': Derived from the Latin 'rivus', meaning a stream or brook. - 'let': A diminutive suffix of Old English origin, used to form nouns denoting something small.