He's 'deadly' [='dead'] serious about finding another job.
Officers are allowed to use 'deadly force' if necessary.
The two gang leaders are 'deadly' enemies.
(..) Whose touch... can heal every person and every thing. So, a quest, a mission of mercy, if you will... into uncharted and deadly waters... with nothing less at stake than our own survival. Now, a satyr is naturally drawn, as you know, to the power of the Fleece. And therefore, it must be a satyr (..)2013 Percy Jackson: Sea of Monsters