Intense Serious Deep Profound in Chinese / Japanese...

深刻 is a Chinese word that is the form of intense that describes a person who is deep, serious, and a true thinker.

If you find yourself contemplating the world and coming up with profound ideas, this might be the word for you. In some contexts (especially Korean), it can mean seriousness, gravity, or acuteness.

In Japanese, this can mean “serious problem” or can be a rare given name, Misa. You should not use this if your audience is Japanese.

真剣 is a Japanese word that means intense, serious, or earnest. It describes a person who is deep, serious, and a true thinker or dreamer.

Literally, this means “true sword,” as compared to a sharpened wooden practice sword blank. It's real, true, and serious.