Vocabulary consisting only from characters you are able to read
協会
kjoukai
association, society, organization, organisationmix
効果的
koukateki
effective, successfulmix
手がかり
tegakari
(1)clue, key, trail, scent, track, contact, (2)handhold, on hand mix
大流行
dairjuukou
extremely popular/extremely common/widespread contagionmix