MEANING: noun: A small stream or channel.

ETYMOLOGY: From Old English rinnan (to run). Ultimately from the Indo-European root rei- (to flow or run), which also gave us run, rival, and derive. Earliest documented use: 1577.

RUNEL - a small mark or letter, of mysterious or magical (but not very great) significance

TRUNNEL - what a locomotive and the cars it's pulling go through on the trip under Mont Blanc

RUNNELM - warning cry to an Ent when woodcutters are detected entering the forest