(v phr) be dependent on
rely on
(adj) minor and not important, not central
marginal
(n) the time during which something continues
duration
(n phr) a situation judged to be safe in comparison to something else
comparative safety
(n) a measurable extent of a particular kind, such as length, breadth, depth, or height
dimension
(v) be a significant cause or basis of (something) even if not necessarily manifest or obvious
underlie
(n) great destruction or damage
devastation
(v) cause to continue for an extended period or without interruption
sustain
(adj) (of a situation) not hopeful or encouraging, unlikely to have a favourable outcome
bleak