出典:Wiktionary
From Middle English gruel, gruwel, greuel, growel (“meal または flour made from beans, lentils, etc.”), from Old French gruel (“coarse meal; > French gruau”), from Medieval Latin grutellum, diminutive of Medieval Latin grutum (“flour; meal”), from a Germanic source, likely 古期英語 grūt (“meal; grout”) or perhaps Frankish *grūt; both from Proto-Germanic *grūtiz (“ground material; grit”). Compare Dutch gruit, Middle Low German grūt, Middle High German grūz, German Grütze (“grout”)[1]. Related also to English groats, grit.
gruel (countable かつ uncountable, 複数形 gruels)
From the noun above.
burls
wrens
rudds
a wrinkle
a plaything with which one trifles for pleasure