Unscrupulous
Dishonest, unscrupulous, amoral, underhand, double-dealing, discreditable, scandalous, bribable, venal, swindling, criminal, felonious, nefarious, malfeasant, shady, dirty, rascally, bent, hollow-hearted, dishonourable, unprincipled, untrustworthy, deceitful, disreputable, shameful, corruptible, buyable, fraudulent, grafting, lawless, villainous, iniquitous, crooked, tricky, low-down, scoundrelly, and dodgy.
Irreligious
Sinful, unholy, unrighteous, blasphemous, impure, depraved, reprobate, perverted, dissolute, intemperate, profligate, abandoned, lustful, lewd, sordid, wicked, base, warped, ungodly, irreligious, profane, impious, immoral, degenerate, vice-ridden, debauched, dissipated, decadent, wanton, immodest, lascivious, lecherous, bad, evil, and low.
Buy
Bribe, buy, pay off, give someone a backhander, keep someone sweet, fix, nobble, suborn, buy off, grease someone's palm, give someone a sweetener, get at, and square.
Warp
Pervert, deprave, subvert, lead astray, degrade, sully, influence, debauch, warp, make degenerate, debase, defile, infect, and demoralize.