obsolete
no longer produced or used; out of date
obstruct
block (an opening, path, road, etc.); be or get in the way of.
orient
To learn new skills or information
Paradox
something (such as a situation) that is made up of two opposite things and that seems impossible but is actually true or possible
peril
serious and immediate danger
perpetual
never ending or changing
ponder
to think about; to consider carefully , especially before making a decision
potent
having great power, influence, or effect
pensive
engaged in, involving, or reflecting deep or serious thought
omit
to leave out someone or something; intentionally or forgetfully