Your inward thoughts or feelings are the ones that you do not express or show to other people.
I sighed with inward relief.
我内心释然地长出了一口气。
An inward movement is one towards the inside or centre of something.
a sharp, inward breath like a gasp.
像倒抽气一样急速吸入的一口气。
If something moves or faces inward or inwards, it moves or faces towards the inside or centre of something.
He pushed open the front door, which swung inwards with a groan.
他推开前门,门呀的一声向里开了。