depressional

Of or pertaining to psychological depression.

It’s only right that the tide of inspirational books should yield to the occasional depressional one — for every humorist, a dishumorist, a man who runs his nails down the blackboard and makes everyone’s hair stand up, though we humorists would note that you have to work hard to get a laugh and that dishumor is tyrannical: you need only say out loud, “How can you people stand around here and enjoy yourselves while the world is falling apart?” and all conversation ends.

Of or pertaining to a physical depression.

Those natural depressional wetlands are comparable to those occurring in the SE and NW case-study areas...