Obvious, Clear, Evident
な adjective
When it's bright around, things become more obvious, clear and evident.
あきらか
Since this is a word that consists of a kanji with hiragana attached, you can bet that it uses kun'yomi. Unfortunately, 明 is a little tricky and has a few of those. So here's a mnemonic to help you remember this one: It's obvious that all you need is a key (あき) to open this door. It's like, blatantly clear. The lock is right there. You really just need a key. Did you forget it? Of course you did…
あなたのお母さんがワイン好きなのは明らかです。
It's obvious that your mom really likes wine.
彼にアイルランド人の血が入ってることが明らかになりました。
It turned out that he has some Irish heritage in his blood.
今日のコウイチは明らかにおかしい。
Koichi is clearly acting strange today.