mediocre ability; an ordinary person lacking outstanding talent (antonym: genius)
自分は凡才だと思っているが、努力は惜しまない。
I consider myself of mediocre ability, but I don't spare effort.
凡才でも努力次第で大成する人はいる。
There are people of ordinary ability who achieve great things through effort.
彼の作品は凡才の域を出ないが、誠実さが伝わる。
His work doesn't go beyond mediocrity, but his sincerity comes through.