the.com/wagerer

Someone who turns uncertainty into a personal financial opinion.

means A person who places a bet, staking money on how they think an uncertain thing will turn out.

from Built straightforwardly from 'wager' plus the agent suffix '-er.' 'Wager' itself traces back through Anglo-French 'wageure' to the verb 'wagier,' meaning to pledge or promise — the same root family that gives us 'wage,' as in a pledged payment for work. So a wagerer and a wage-earner share a buried ancestor: both involve pledging something on an outcome, one on a bet, the other on labor.

older than bettor
used in english since the 1500s
not a gambler
technically just backs a single specific claim
etymology
from wage, meaning a pledge, not a salary
the.com · every word