ruin *oneself / be depraved / be corrupted / go to the bad

greed / avaricious / greedy / avarice

rotate / revolve

graft / golden key / palm oil / boodle / bribe / slush

graft / golden key / palm oil / bribe / slush / boodle

use / make good use of / turn [one's time] to profitable account / apply *something to / make use of / take advantage of / utilize / harness / utilization

support / <<matter>> attest to / give proof / testify / establish / <person> prove / demonstrate

ruin *oneself / be depraved / be corrupted / go to the bad

countryman / villager / rustic

boundary / limits / confines / limit / bounds