in a difficult situation; at a dead end; cornered (as in 穷寇 qióng​kòu or 穷途末路 qióng​tú​mò​lù)

Used between clauses to show a logical result or consequence, often translated as "then", "in that case", or "consequently".

(bound form) to think; to consider; to deliberate

to change; to become different; to transform into something else