the.com/eager
Enthusiasm that arrives before invitation and refuses to read the room.
means Wanting something so keenly you can barely sit still about getting it.
from From Latin acer, sharp or keen — the same root behind acid and acrid, when feelings had a cutting edge.
Sharp rootsOriginally meant biting or sour, like vinegar.
Eager beaverAmerican slang since the 1940s military.
Lost siblingVinegar literally means eager wine in Old French.