IPA: /ˈrʌnəl/
KK: /ˈrʌnəl/
A small, narrow stream of water or a tiny channel that carries water.
After the rain, a runnel formed in the garden, carrying water away from the plants.
Runnel comes from the Middle English 'runnele', which is a diminutive form of 'runne' (meaning a small stream or brook), derived from Old English 'ryn' (meaning to flow). The word 'runnel' refers to a small stream or a brook, emphasizing its diminutive nature.
Think of a small stream flowing gently — that's what a runnel is, a little 'runner' of water.