to confuse two or more things
2つ以上の物を混同する (futatsu ijou no mono o kondou suru)
"I always mix up their names during meetings."
"会議中、私はいつも彼らの名前を混同します。" (kaigi chuu, watashi wa itsumo karera no namae o kondou shimasu)
to challenge someone to prove their authority or claim
to learn by making mistakes or through difficult experiences
to identify and fix issues or errors
to deal with a problem when it arises, rather than worrying...
someone very precious or loved
to increase interest or support for something