Origin: French suffix -ier
Qualifier has 3 different meanings across 1 category:
a contestant who meets certain requirements and so qualifies to take part in the next stage of competition
"the tournament was won by a late qualifier"
One who qualifies for something, especially a contestant who qualifies for a stage in a competition.
"After weeks of rigorous training and preliminary rounds, she finally emerged as the sole qualifier for the national championship finals."