A Bean Nighe is thought to have one nostril, one big protruding tooth, webbed feet and long hanging breasts. A mortal who is bold enough to sneak up to her while she is washing and suck her breast can claim to be her foster-child. The mortal can then gain a wish from her.
The Washer of the Fords is sometimes known under the generic name of ban nighechain (little washerwoman) or nigheag na h-ath (little washer at the ford).