the.com/norepinephrine

means A neurotransmitter and hormone that sharpens focus, speeds the heart, and primes the body for action in response to stress, danger, or excitement.

from Built from Greek and Latin pieces stacked to describe its chemistry and cousin-relationship to epinephrine (adrenaline). 'Nor-' is a chemistry prefix (from German Normal, shortened in compound naming to mark a demethylated, structurally 'parent' form of a compound). 'Epinephrine' itself comes from Greek epi- ('upon') and nephros ('kidney'), since the adrenal glands sit atop the kidneys. So norepinephrine's name quietly encodes its identity: the simpler, structurally 'normal' sibling of the hormone made on top of the kidney.