olemus
Wiktionary:
adj
1. fatal; resulting in death
terminal cancer
2. appearing at the end; top or apex of a physical object
3. occurring at the end of a word, sentence, or period of time, and serves to terminate it

terminal bonus -- vallandustasu
terminal illness -- parandamatu haigus
terminally -- lõplikult
terminal wage -- vallandustasu; lõpparve