the.com/yearling

Old enough to have opinions, too young to have sense.

means An animal (or, jokingly, a person or thing) that is one year old — past infancy but nowhere near mature.

from A straightforward 16th-century build: the noun 'year' plus the suffix '-ling,' which marks something young, small, or newly belonging to a category (think 'duckling' or 'underling'). No hidden story here — it's a plainly literal word for a plainly literal stage of life, first used for farm and racing animals before it wandered into joking use for people.

age range
one to two years old, species depending
horse racing use
all yearlings share January 1st as official birthday
awkward phase
grown body, undercooked brain, maximum chaos
etymology
literally just year plus ling, no frills
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