noun
immolation
im-uh-LAY-shun/ˌɪməˈleɪʃn/
Killing or destroying by fire as an act of sacrifice or protest.
The animal offering undergoes immolation on the ceremonial altar.

Etymology
The roots describe putting sacrificial meal upon a victim, a preparatory act that came to stand for sacrificial killing itself. This sacrifice word later acquired a strong association with death by fire.
More examples
- The ritual involves the immolation of offerings in a sacred fire.
- Witnesses describe the monk's immolation as an act of protest.
- The historian compares ritual immolations in several ancient societies.
Forms
immolation · immolations
immolate verb — To burn as a sacrifice or protest.