(idiomatic) to commit something to memory

(colloquial, idiomatic) to be a crafty, sly devil/fox, to be a sly dog, to be sly as a fox (be crafty, sly, or occasionally impish and punchy in spite of one’s harmless, innocent, naive appearance) (of people; more rarely, of animals) / (colloquial, idiomatic, figuratively) not to be as harmless, innocent, naive as it may seem at first glance; not to be underestimated (of things and abstract notions)

eared seal, walking seal

earwax

deafening

wing chair, wingback chair

earmuff

plural of Ohrenrobbe

earplug

nominative/accusative/genitive plural of Ohrenschmalz