1.
deep impression, being deeply moved
A profound emotional impact left by something admirable or meaningful. Stronger and more formal than simply being impressed.
Writing
感 (feeling/emotion) + 銘 (inscription/engraving). The image is of an impression being "engraved" on the heart.
Usage
Almost always appears in the set phrases 感銘を受ける (to be deeply impressed) or 感銘を与える (to make a deep impression on someone). A relatively formal word commonly used in speeches, essays, and interviews.