I was reading some manga, and I saw some kanji that I didn't k | Learn Japanese

I was reading some manga, and I saw some kanji that I didn't know the meaning of, but I had seen before

I thought

あの漢字見た事あるけど意味がわかんない [あのかんじみたことあるけどいみがわかんない]

"I've seen that kanji, but I don't know it's meaning"

here I use the た form of the verb 見る, and 事ある [ことある] to mention something I've done before (or not done, if using the negative of ある, which is ない)