adj. 25B6; adjective
a lewd old man : LECHEROUS, lustful, licentious, lascivious, dirty, prurient, salacious, lubricious, libidinous, lickerish; debauched, depraved, degenerate, decadent, dissipated, dissolute, perverted; informal horny; Brit. informal randy; formal concupiscent.
a lewd song : VULGAR, crude, smutty, dirty, filthy, obscene, pornographic, coarse, off colour, unseemly, indecent, salacious; rude, racy, risqué, naughty, earthy, spicy, bawdy, ribald; informal blue, raunchy, X-rated, nudge-nudge, porno; N. Amer. informal raw; euphemistic adult.
chaste, clean.