Migraine
Etymology
From Greek “hēmikrania” — “hēmi” (half) and “kranion” (skull) — for pain felt on one side of the head. It traveled through Latin “hemicrania” and Old French “migraigne” before settling into English, worn down over centuries but still carrying its original clinical observation of the one-sided ache.
noun · /MY-grayn/
A neurological disorder marked by intense, often one-sided headaches, frequently with nausea and sensitivity to light and sound.
What it names
Something people routinely underestimate — not a bad headache but a distinct brain condition, often disabling, sometimes preceded by visual disturbances called auras.
Example
She had to lie in a dark room all afternoon because the migraine made even the glow of her phone unbearable.
Related idea
A migraine is a neurological condition; an ordinary tension headache is a passing ache from muscle strain or stress. Calling every bad headache a migraine blurs a real distinction — the migraine brings its own machinery of aura, nausea, and light-sensitivity that a common headache does not.