What speakers mean by it now
In present-day English, eared is almost never a free-standing everyday adjective. It lives in compounds. A long-eared bat, a lop-eared rabbit, a jug-eared portrait, a dog-eared paperback: the second half simply marks that something has ears, or something that can pass for ears, of a named kind. Naturalists still use the bare form in a few set names, such as the eared grebe or the eared seals, where the point is that the animal shows an external ear flap that related species lack.
The word is also a past participle. Grain can ear, putting out its seed spike, so a field may be said to have eared. In older English the same spelling is the past of a different verb, now archaic, that meant to plough. The three uses are not the same word underneath.
The origin of the word eared is a native assembly, not a loan. English took a noun or a verb it already had and added the old suffix that means provided with, or that marks a completed action.
Built at home
Middle English already had ered and related spellings, formed from ere, the ordinary word for the hearing organ, plus the participial and possessional ending that later settled as -ed. Nothing in the chain has to be borrowed from French or Latin for the adjective to exist.
The ending itself is old. Old English used -ed, -ad, and -od on weak verbs; Middle English levelled most of them to -ed. The same piece also builds possessional adjectives from nouns: bearded, winged, hoofed. Eared belongs to that workshop.
One early relative is worth naming because it shows the pattern already at work before the modern spelling. Etymological notes record Old English earde with the sense having a handle. The image is the same one later used of pitchers and pans: a projection at the side, like an animal’s ear, made for gripping. That is morphology doing real work, not a folk story about ears wandering onto crockery.
The hearing organ behind most uses
The usual base is the native noun ear, the organ of hearing. It comes from Middle English ere, from Old English ēare, from Proto-West Germanic *auʀā, from Proto-Germanic *ausô. Behind that stands a Proto-Indo-European noun for the ear, reconstructed in older handbooks as *ous- and in current work as *h₂ṓws, with an oblique stem *h₂éws-. Those labels point to one root, not two competing etymologies.
Germanic cognates keep the family resemblance: Dutch oor, German Ohr, Old Norse eyra, Gothic auso. Outside Germanic the same root yields Latin auris, Greek ous, Lithuanian ausis, Old Church Slavonic ucho, and Old Irish au. English did not import eared from any of those languages. It inherited the noun and then, inside English, derived the adjective.
Because the suffix is so productive, the adjective is happiest in combination. OED evidence for long-eared begins in the late sixteenth century. Crop-eared, used of people or animals whose ears have been cut short, is recorded from 1530. Prick-eared, for ears that stand up, is already late Middle English. Those dates describe the compounds, not the first moment anyone could have said that a creature was eared. The OED places adjectival eared in Middle English, with evidence before 1300 in the Physiologus, a verse bestiary tradition in which animals are described by their parts. That is the expected habitat for a word meaning furnished with ears.
Transferred senses follow the shape of the outer ear. A vessel with two side handles can be eared; Middle English quotations speak of an eared pan and of eared chalices for pouring. Owls called eared are named for feather tufts, not for extra hearing organs. In heraldry, a shield described as eared has small triangular projections at the upper corners. Dog-eared pages take their name from the folded corners of a dog’s ear: the verb to dog-ear is known from the 1650s, the noun dog’s ear from the early eighteenth century, and the worn, unkempt extension of dog-eared by the 1890s.
Two other ears, two other participles
English also has ear for the seed spike of cereal plants. That noun is native too, but unrelated. Old English ēar (Northumbrian æher) goes back to Proto-Germanic *ahaz and to the Indo-European root *h₂eḱ-, the sharp or pointed set that also gives English edge. Cognates include Dutch aar, German Ähre, Old Norse ax, and Gothic ahs. When wheat or maize ears, the verb is this noun put to work. Eared in a field of corn therefore means come into ear, and compounds such as full-eared follow the same possessional pattern. The OED’s grain-related adjective is separately derived from that noun and verb, with Middle English evidence from John Trevisa before 1398.
A third homonym is the archaic verb ear, to plough. It continues Old English erian, from Proto-Germanic *arjaną, from Indo-European *h₂erh₃-. Latin arare, Greek forms for ploughing, and Gothic arjan are true cognates of this verb, not of the hearing-organ noun. In early Modern English the past participle still appears in legal and biblical prose for land that has been turned with the plough. Readers who meet eared in that setting are not looking at a creature’s ears or a head of grain. They are looking at a completed act of tillage.
Dictionaries keep these strands apart because they must. Webster’s New International dictionary, for example, gives one adjective from Middle English ered, ear plus -ed, for animals and projections, and another from the past participle of the grain verb. The OED splits the adjective still further. The spellings collapsed; the histories did not.
What the suffix conceals
The useful takeaway is not a single ancestor for every eared on the page. It is that English reused one short ending on three native bases that had already fallen together in sound. The hearing-organ line, the grain-spike line, and the ploughing line are separate inheritances. Only the first explains why a seal, an owl, a jug, or a folded page can be eared. The other two explain why a field can be, and why an old translation can call land eared when no animal is in view.
If you need one dated landmark for the hearing-organ adjective, take the Middle English period and the bestiary evidence before 1300. If you need a reminder that the spelling is a trap, take the ploughing participle, still printed in the seventeenth century, sitting beside compounds that have nothing to do with a furrow.