内在 (nèi zài): inner; internal; intrinsic; innate

Although she looks delicate on the outside, her inner will is very strong; she never gives up easily when facing difficulties.

When evaluating a person, you shouldn't just look at appearances; you should look at their inner qualities, such as kindness, honesty, and a sense of responsibility.

This company's problem isn't a lack of funds; it's that serious flaws have appeared in its internal management, causing employees to resign one after another.

When learning a foreign language, you can't just memorize words; you also need to understand the inner logic of the language, so that you can truly use it flexibly.

After several years of spiritual practice, he gradually found inner peace and is no longer easily affected emotionally by external things.