: having or producing no echo the hollow and echoless darkness— K. L. Patton.

What does Devolatilized mean?

: to remove volatile material from (something, such as coal)

What does Intetive mean?

1 : an introductory step took the initiative in attempting to settle the issue. 2 : energy or aptitude displayed in initiation of action : enterprise showed great initiative. 3a : the right to initiate legislative action.