To Pass
To Elapse
intransitive verb, godan verb
You know how 経 means passage of time, right? Well, this is the verb form of that. What does time do when it passages? It passes. So, this verb means to pass or to elapse.
Since this word consists of a kanji with hiragana attached, you can bet that it will use the kun'yomi reading. You didn't learn that reading with this kanji, so here's a mnemonic to help you: What do you say to time as it begins to pass you by? "Ta ta (た), Time!"
時間が経つのを忘れて、ゲームに夢中になっていました。
I was so into the game I didn't notice the time pass.
トーフグができてから、もう何年経ちましたか？
How many years have passed since Tofugu started?
「あいつら、幸せな結婚生活を送れると思う？」「時間が経てばわかるよ。」
"Do you think they will have a happy marriage?" "Time will tell."