Furthermore
Further, Again
adverb, conjunction
When you're renewing what you're saying, you're adding onto it, which makes this furthermore or further.
This is one of those good paragraph or sentence-starting essay words, which is how you'll often see it used!
The kanji stands by itself with a particle, meaning that this uses the kun'yomi reading, which you didn't learn with the kanji. Here's a mnemonic to help you:
You know a person that starts every other sentence by saying "Furthermore," and that's... Sarah (さら). Really feel yourself getting annoyed with this Sarah for starting every other sentence with "Furthermore, ...!"
Just note that 更に is often written in kana, as さらに, especially in casual writing!
更に言う
to say further
更に進む
to further advance
更に強化する
to strengthen further
更に悪化する
to get even worse
更にこうした事例もあります。
Furthermore, there are also examples like these.
何度失敗しても更に試みるつもりです。
No matter how many times I fail, I intend to try again.
この連続殺人事件で更に被害者が出てしまった。
Even more victims are being discovered in this serial murder case.
更に英語を上達させるには、ネイティブスピーカーと喋り続ける必要があります。
To further improve your English, you need to continue speaking to native speakers.